Showing posts with label amaryllis. Show all posts
Showing posts with label amaryllis. Show all posts

Sunday, August 30, 2026

Amaryllis: The Magnificent Hippeastrum — From the Tropics of the Americas to the Christmas Windowsill

 

Hippeastrum display
Few flowers possess the theatrical grandeur of an amaryllis. A seemingly lifeless bulb, brown and rather unpromising, suddenly sends up a stout green stalk crowned by enormous trumpets of scarlet, crimson, pink, salmon, white or some marvelous combination of them all. And it performs this little miracle just when the garden outside has grown quiet.

That is why the amaryllis has become so closely associated with Christmas. Alongside paperwhites, holly, mistletoe and evergreen boughs, it brings living color into the house during the darkest weeks of the year.

But the plant we commonly call “amaryllis” has a story considerably more exotic than its place beside the Christmas tree might suggest.

First, a Botanical Curiosity: Amaryllis Isn't Really Amaryllis

The familiar Christmas amaryllis belongs to the genus Hippeastrum.

True Amaryllis is a different genus altogether, best represented by Amaryllis belladonna, the belladonna lily of South Africa. Our familiar holiday bulbs, by contrast, belong to a large group of plants native primarily to tropical and subtropical regions of the Americas.

The confusion is an old one, and after generations of gardeners calling Hippeastrum “amaryllis,” there is little prospect of persuading everyone to stop.

Nor is there much reason to try.

In ordinary gardening language, amaryllis means Hippeastrum, and probably always will.

The name Hippeastrum itself comes from Greek words referring to a horse and a star, giving rise to the wonderfully picturesque translation “knight's star” or “horseman's star.” One glance at a great red flower held high on its stalk makes the name seem quite appropriate.

A Flower from the New World

Wild Hippeastrum species are native to the Americas, with their greatest diversity in South America. Their range extends through tropical and subtropical regions where different species evolved in forests, grasslands, rocky places and seasonally dry habitats.

Europeans encountered these remarkable bulbs as botanical exploration of the New World accelerated during the seventeenth and eighteenth centuries.

There isn't really a single moment when one can say that Hippeastrum was “discovered.” Indigenous peoples of the Americas obviously knew the plants long before Europeans arrived, and different species reached European botanical collections at different times.

The taxonomic story became particularly tangled.

Carl Linnaeus placed plants that we would now recognize as belonging to both Amaryllis and Hippeastrum together under Amaryllis in the eighteenth century. As botanists obtained more specimens and understood the plants better, it became apparent that the South African and American plants represented distinct groups.

The English clergyman and botanist William Herbert formally established Hippeastrum as a separate genus in the early nineteenth century.

And from that point the great adventure in Hippeastrum breeding really began to gather momentum.

The Watchmaker Who Helped Create the Modern Amaryllis

One of the charming episodes in amaryllis history involves not a professional botanist, but an English watchmaker.

Arthur Johnson of Prescot, England, crossed two species of Hippeastrum around 1799. The resulting plant became known as Johnson's amaryllis, Hippeastrum × johnsonii.

It was one of the earliest important hybrids in the long development of the modern garden amaryllis.

Johnson shared his hybrid with the Liverpool Botanic Garden—an especially fortunate decision because his own greenhouse was later destroyed by fire.

During the nineteenth century, additional South American species were brought into European collections. English, Dutch and other European breeders crossed them repeatedly, selecting offspring for larger flowers, stronger stems, richer colors and more reliable blooming.

The rather graceful wild flowers of South America gradually gave rise to the enormous trumpets familiar today.

From Wildflower to Floral Aristocrat

Modern Hippeastrum hybrids scarcely resemble some of their wild ancestors.

A good bulb may produce one or more thick flower stalks, each carrying several enormous blossoms. Flowers of large hybrids can approach eight to ten inches across.

The traditional colors remain glorious: deep Christmas red, snowy white and every shade of pink between them.

But modern breeding has greatly expanded the possibilities.

There are now salmon, coral, orange and greenish cultivars; picotee flowers with contrasting edges; striped and feathered flowers; narrow-petaled spider forms; miniatures; and extravagant doubles whose blossoms sometimes look more like peonies than traditional amaryllis.

The New Generation of Hippeastrum

Some of the most interesting breeding work involves forms far removed from the old-fashioned giant red Christmas amaryllis.

Cybister-type Hippeastrum, developed using species with narrow, spidery petals, have introduced an entirely different silhouette. Their flowers can be graceful, exotic and almost orchid-like.

Double-flowered hybrids have become increasingly sophisticated as well. Instead of merely producing extra petals, the better modern doubles form great, carefully layered flowers.

Breeders are also selecting for shorter, sturdier plants better suited to containers, unusual color combinations, increased flower counts and improved performance as cut flowers and potted plants.

Hippeastrum breeding remains very much alive. A 2026 scientific study of new breeding material noted that an average of about 33 new Hippeastrum cultivars are registered annually in the international register maintained in the Netherlands. Modern researchers are also using genetic analysis alongside traditional hybridization to understand and exploit the remarkable diversity available to breeders.

So this is by no means a flower whose story ended in Victorian conservatories.

We are still making new amaryllis.

The Christmas Miracle in a Bulb

Perhaps the greatest virtue of Hippeastrum is that an enormous quantity of stored energy lies inside that big bulb.

The flower has essentially been prepared in advance.

Give the bulb warmth, moisture and light, and the performance begins.

Unlike tulips, daffodils and many other spring bulbs, newly purchased prepared amaryllis bulbs generally do not require the lengthy cold treatment associated with traditional spring-flowering bulbs. This makes them exceptionally easy to bring into bloom indoors.

How to Force Amaryllis for Christmas

If you want amaryllis blooming around Christmas, timing matters—but nature reserves the right to alter the schedule by a week or two.

Different cultivars bloom at different speeds. Temperature, bulb size and the condition of the bulb also influence flowering.

As a general rule, allow approximately six to eight weeks from planting to bloom, although some bulbs can take longer. For Christmas flowers, planting from late October through early November is usually sensible. If Christmas bloom is particularly important, err on the early side.

Choose the largest, firmest bulb available. Large bulbs contain greater reserves and frequently produce more than one flower stalk.

Use a sturdy pot with drainage holes only about one or two inches wider than the bulb. Amaryllis actually perform well when somewhat pot-bound. A heavy clay or ceramic pot also helps prevent a tall, flower-laden plant from becoming top-heavy.

Fill the container with a loose, well-drained potting medium.

Set the bulb so that approximately the upper one-third to one-half remains above the soil. Do not bury it as you would a daffodil.

Water thoroughly after planting and allow excess water to drain.

Then exercise restraint.

Until active growth begins, excessive water is much more dangerous than insufficient water. Keep the medium only slightly moist. Once the flower stalk and leaves are actively growing, watering can be increased, but the soil should never remain waterlogged.

A temperature around 70° to 75°F encourages growth. Once flowers begin opening, moving the plant to a somewhat cooler location—roughly 65° to 70°F—and keeping it out of strong direct sun can prolong the display.

Turn the pot periodically as the stalk develops because it will lean toward the light.

And then wait.

Watching an amaryllis grow is half the pleasure. A stalk that seems barely to have moved one morning may have gained noticeably by evening.

Plant Several for a Longer Christmas Display

One of the best ways to enjoy amaryllis throughout the holiday season is not to plant them all at once.

Stagger the plantings.

Plant a few bulbs in late October, another group a week or two later, and perhaps another toward the end of November.

Instead of gambling everything on one Christmas Day performance, you can have flowers opening from Advent through Christmas and perhaps well into January.

Several bulbs planted together in a large decorative container can be magnificent.

There is something almost architectural about a group of red amaryllis rising above a broad bowl on a dining table or in an entrance hall.

Don't Throw the Bulb Away After Christmas

An amaryllis is not necessarily a disposable Christmas decoration.

After flowering, remove the spent blossoms so the plant does not waste energy making seed. When the flower stalk begins to yellow, cut it back.

But leave the green foliage alone.

Those long strap-like leaves are solar panels. Through photosynthesis they replenish the food reserves exhausted in producing those enormous flowers.

Place the plant in bright light, water normally and fertilize periodically while the foliage is actively growing.

When warm weather arrives, the pot can be moved outdoors after danger of frost has passed. Introduce it gradually to stronger sunlight.

With good treatment, the bulb can grow larger and stronger each year.

Making an Old Amaryllis Bloom for Christmas Again

Reblooming is fairly easy.

Timing the bloom for Christmas requires a little more planning.

After allowing the plant to grow vigorously through spring and summer, reduce and eventually stop watering toward late summer or early autumn. Allow the foliage to yellow naturally.

The dormant bulb can then be kept dry in a cool location around 50° to 55°F for approximately eight to ten weeks. After its rest, return it to warmth and light and resume watering.

Allow another six to eight weeks for flowering.

This means the gardener works backward from Christmas.

The calendar becomes part horticulture and part arithmetic.

Growing Amaryllis in the Garden

Gardeners in warm climates have another option: plant Hippeastrum permanently outdoors.

And this is where amaryllis becomes much more than a Christmas novelty.

In the landscape, a well-established colony can produce a spectacular spring display year after year.

Choose rich but well-drained soil. Poor drainage is one of the surest ways to lose the bulbs.

A location receiving morning sun with some protection from the fiercest afternoon heat is often excellent, particularly in the Deep South.

Space bulbs roughly a foot apart if you want them eventually to form substantial clumps.

Do not bury them deeply. The upper portion or “nose” of the bulb should remain near the soil surface. Clemson recommends planting landscape amaryllis with the bulb tops only lightly covered, while University of Georgia guidance similarly places the nose around soil level.

Over time, mature bulbs produce offsets and handsome colonies can develop.

What USDA Zones Can Grow Amaryllis Outdoors?

This question deserves a little caution because Hippeastrum hardiness varies among cultivars and species.

USDA Zone 9 is the safest general recommendation for leaving most Hippeastrum outdoors permanently. University of Georgia notes that some species and hybrids are hardy outdoors in Zone 9.

However, gardeners can push considerably farther north with appropriate cultivars and protected locations. Clemson Cooperative Extension reports that amaryllis can be grown as landscape plants through USDA Zone 8 in South Carolina.

Therefore, a practical rule is:

Zones 9–11: Generally excellent territory for permanent outdoor culture.

Zone 8: Often successful, particularly in sheltered locations with good drainage and winter mulch, though cultivar hardiness matters.

Zone 7 and colder: Treat ordinary Hippeastrum primarily as container plants unless experimenting with unusually hardy selections and protected microclimates.

And gardeners should remember that winter wet can sometimes be as destructive as winter cold.

A bulb planted beside a warm south-facing wall in sharply drained soil lives in a rather different world from one sitting in cold mud at the bottom of a slope.

Microclimates matter.

Amaryllis in the Southern Garden

Hippeastrum deserves greater use in Southern landscapes.

An old clump beside a porch, garden gate or front walk has a completely different character from a single Christmas bulb in a foil-covered pot.

It becomes part of the place.

Plant amaryllis among evergreen groundcovers, along the edge of a shrub border, beneath high-canopied deciduous trees, or in the old Southern fashion near foundations and walks where generations of gardeners traditionally planted treasured bulbs.

The foliage persists long after flowering, so companions should be chosen with that in mind.

Hostas, ferns, liriope, cast-iron plant and other broad-leaved plants can soften the appearance of the long amaryllis foliage after bloom.

In suitable climates, a dozen bulbs planted together and allowed to multiply can eventually become a great spring colony.

That is gardening on a different scale from buying a Christmas bulb every December.

A Bulb That Can Become an Heirloom

Perhaps the most appealing thing about amaryllis is its longevity.

Properly cared for, a bulb can live and flower for many years, increasing in size and producing offsets that can eventually be separated and replanted.

That gives the plant something increasingly uncommon in our disposable age.

Continuity.

An amaryllis received as a Christmas gift need not disappear with the wrapping paper and Christmas tree. It can be grown through summer, rested, flowered again, divided, shared with children and grandchildren, or—where climate permits—planted beside the house and allowed to remain there.

Some of the finest garden plants are those that acquire a history.

“This came from Grandmother's garden” is a pedigree no plant breeder can improve upon.

One More Curious Fact: The Bulb Can Bloom Without Soil

The enormous reserves contained within an amaryllis bulb explain the recent popularity of waxed amaryllis.

These bulbs are prepared and sealed in decorative wax. They need neither pot nor soil and are generally sold with enough stored energy to produce their flowers without ordinary watering.

It is an extraordinary demonstration of what a bulb actually is: not merely a root, but a living storehouse containing the resources for another season's growth.

For long-term culture, however, the traditional potted bulb is the better choice.

A Little Tropical Splendor in Midwinter

There is a wonderful contradiction in the amaryllis.

It is a child of the warm Americas that has become one of our most beloved flowers of northern winter.

Outside the window may be bare branches, gray skies and frost.

Inside, a green spear rises from an enormous brown bulb.

Then another.

The buds swell.

And suddenly there are trumpets of scarlet or white opening beside the Christmas greenery.

That transformation explains why generations of gardeners have loved Hippeastrum. Few plants provide so much spectacle for so little effort, and fewer still can move so gracefully between Christmas windowsill and Southern garden.

Plant one for Christmas and it is beautiful.

Keep it for twenty years, divide it, plant its offspring around the garden and pass a bulb along to someone you love—and it has become something more.

It has become an heirloom.

Return to GoGardenNow.com 

 

Monday, September 23, 2013

Amaryllis leaves are dying after I transplanted them.

Dead leaves on transplanted hippeastrum.

Q. Hey. I asked you back in June if I could move my amaryllis in summer even though the foliage never died back. You said I could. Now the foliage is dying back. Will the bulbs die, too? I'm sending you a picture.

A. Judging from your photo, the bulbs are in good health. Notice the firm shoulder. It's not unusual for the foliage to die back. In fact, it's normal. I expect that your plants will bloom nicely next season. The ones that have defoliated may even bloom earlier.

Return to GoGardenNow.com.

Saturday, June 29, 2013

Can I move my amaryllis in summer?



Q. I have amaryllis bulbs planted in my garden. They never become fully dormant even in winter, but they bloom okay every spring. I need to move some of them. Can I move them even though the leaves are still green?

A. Yes, you can move your amaryllis (Hippeastrum) even in summer. I suggest you dig up as much of the soil around them as possible to avoid disturbing the roots. Dig another hole the same size at the site where you intend to transplant them, then carefully drop the root ball in the empty hole. Water well when complete. You shouldn't have any problems.

Return to GoGardenNow.com.

Friday, February 5, 2010

Fair Amaryllis

When two individuals in a family are called by the same name, some confusion is sure to ensue.  Such is the problem with Amaryllis.  The Amaryllidaceae family has two members (genera) called Amaryllis.  For most, any mention of the name brings to mind the ample, star-shaped flower popular around Christmas.  But that is her assumed name.  Her real name is Hippeastrum (pronounced "hippy-ASS-trum"), but with a name like that, it's no wonder that Amaryllis is preferred.  Hippeastrum is native to South America.

Then there is Amaryllis belladonna, the lesser known - a genus with only one species.  She is named for "fair Amaryllis", the shepherdess in Virgil's Eclogues.  More than fair, Amaryllis belladonna literally means "sparkling, beautiful lady."  No hippy-ass-strum is she.

Amaryllis is native to South Africa.  She stands 24" to 36" tall, and bears lovely pink or white flowers on bare, slender stems in late summer before foliage appears.  Thus, she is sometimes called "Naked Lady", "Belladonna Lily" or "August Lily."  A cautionary note:  Amaryllis is beautiful and beguiling, but like so many ornamental plants, is poisonous if ingested.  Keep your lips off.

Though cold-hardy in USDA climate zone 7 through 10, those who live in cooler regions can grow amaryllis successfully in containers and protect over winter.

If planting in the garden, select a site in full sun with richly organic, well-drained soil.  Soil pH should be between 6.1 and 7.8.  The best way to determine if the pH is within that range and contains the proper nutrients is to have the soil tested.  Your local Cooperative Agricultural Extension Service can help you.  You can collect the soil sample yourself.  For a nominal fee, they will send your soil sample to a laboratory for analysis.  Be sure to call the Extension office for instructions.

Cultivate the soil to the depth of 12".  Add plenty of well-rotted compost.  Remove weeds.  Soil test results may recommend other soil amendments.  Bone meal is especially beneficial for bulbs.  If you use synthetic fertilizer, allow at least a week before planting so it can be incorporated into the soil by rain or irrigation and not burn the bulbs.

Plant amaryllis bulbs 12" apart and 5" deep.  The depth is calculated from the bottom of the bulb.  Irrigate if rainfall is inadequate, but take care not to over-water.

Growing amaryllis in containers is not much different than in the garden.  Use the finest potting soil; cheap soil will give poor results.  The best potting soils will be light-weight, peat-based with added materials to enhance plant growth.  Select containers that will accommodate the bulbs and any other suitable companion plants.  All companion plants should have similar soil and moisture requirements.  Because container gardens can dry quickly, take steps to keep the pots properly watered.  Adding moisture retentive gel to the soil can be beneficial.  Larger containers are not as susceptible to drying.  Tipping over can also be a problem with small containers.

When bloom time is over, let the foliage remain to build reserves in the bulbs for the next growing season.  Continue to irrigate as needed.  You may remove the foliage when it has turned yellow.

Amaryllis partners well with late-flowering asters, coreopsis, daylilies, gypsophila, kniphofia, salvia, mullein and verbena.

Amaryllis is fair, indeed.  Plant a box of them.  Your garden will become all the more enticing with "sparkling, beautiful" ladies habiting there.

Return to GoGardenNow.com.

Friday, September 4, 2009

Hippeastrum Will Delight You

The genus Hippeastrum (pronounced "hip-ee-ASS-trum") is native to sub-tropical and tropical areas of South America and the Caribbean. The name is formed from two Greek words referring to "cavalry" and "star." It is theorized that the man who named it in 1837, the Reverend William Herbert, was thinking that the flower resembled a weapon used by medieval knights. Though the plants are of the Amaryllidacea (pronounced "am-uh-ril-id-AY-see-ee") family, Hippeastrum are incorrectly called "amaryllis." True Amaryllis are members of a separate genus.

Commercial bulb growers in the Netherlands noticed them and began developing them shortly after they were discovered. The cultivars developed there are known as Dutch Hippeastrum or Dutch Amaryllis. In the 1940s, a couple of Dutch growers moved their operations to South Africa and began developing them there. Unfortunately, South African Hippeastrum are not as widely available as the Dutch cultivars, but they are every bit as beautiful.

Commercial hippeastrum cultivation is no longer confined to Holland and South Africa; growers in other countries have begun their own development programs.

Hippeastrum are easily grown indoors. Because they are readily available in fall and early winter, they are very popular as gift items during the Christmas season.

Growing them indoors is a snap. Obtain good quality bulbs. The larger ones will produce the most flowers and be much more satisfying. Select planting containers with good drainage that are 6" to 8" deep, and wide enough to allow 1" to 1-1/2" of space around the bulbs. Hippeastrum do well when pot-bound. Potting soil should be peat-based and blended with perlite for good drainage. Plant each bulb in the center of its pot with one third of the bulb exposed above the soil level. Water thoroughly and allow to drain.

It is not necessary to feed the bulb at planting time; many popular brands of potting soil already contain small amounts of fertilizer. When the last flowers fade, feed the plant every two or three weeks with a balanced liquid fertilizer or slow-release bulb fertilizer. Always follow label instructions.

Watering at planting time should be the last time you do so until the flower stem begins to appear. Then resume watering and keep the soil slightly moist. Irrigating once every week to ten days should suffice. Slowly pour water around the bulb into the soil. If grown indoors, the room temperature should be maintained at 70 to 75 degrees. A cool room temperature will extend the bloom period. Plenty of indirect light is necessary; southern exposure is best.

When spring arrives and danger of cold weather is past, move your plant outdoors. You may keep the pot on a porch or patio, or submerge it somewhere in your garden. Submerging it will relieve you of watering as frequently. Avoid direct sun during the heat of the day.

Sometime around late summer to early fall, the plant will begin to slip into dormancy. Cut back on watering and fertilizing. If your area is experiencing a lot of rainfall, bring the pot indoors. When the foliage has yellowed and dried, trim it off.

Every couple of years or so, you may want to remove the dormant bulb from its pot and inspect it for fungus or insect damage. If the damage is not severe, trim off affected material and dust with an appropriate fungicide according to label instructions. Store the bulb in a cool, dark area with good air circulation. The parent bulb may have produced smaller ones from the base. They can be separated and planted in their own pots.

The normal period of dormancy lasts for a little over six weeks. The bulb may signal that its dormancy is completed when it begins to produce a new flower spike. If it doesn't, watering it once again and bringing it into the light may induce a new growth cycle.

Hippeastrum were not discovered growing in pots somewhere in Brazil. They were in the ground. So you should be able to grow them in your garden if you live in a warm climate. USDA climate zones 8 through 11 have hospitable climates. Plant the bulbs in partial shade and well-drained soil with pH ranging from 5.6 to 7.5. The shoulders of the bulbs should be exposed above the soil surface just as those planted in pots. The large bulbs used for forcing can be planted outdoors after blooming. But if you want to plant more than a couple, purchase the smaller, less expensive garden bulbs when they become available in spring.

Hippeastrum will delight you. Their large flowers and bold, strap-like foliage brighten any room or garden with tropical elegance.

Return to GoGardenNow.com.

Friday, September 12, 2008

Fall Bulbs For Warm Climates


Well, of course fall is on the way. And though some parts of the U.S. are already enjoying moderating temperatures, we in the Deep South are not. So it's difficult for us to get into the mood to think about planting fall bulbs. In fact, one customer recently wondered whether there are any fall bulbs that perform reliably in our heat. For some of us, average minimum winter temperature is only 40 degrees Fahrenheit. So I decided to put together a quick list of fall bulbs that do well in warm climates.
As you scan the list below, you'll notice that a number and, usually, a letter follows each plant name. That is the warmest USDA climate zone where that plant is reported to succeed. If the plant does well in much colder zones, I feel it's unnecessary to state the climate range. However, there are some bulbs that are only successful in the warmest zones, so I noted their range, e.g. "9-11."
  • Allium aflatunense 9b
  • Allium giganteum 9b
  • Allium sphaerocephalum 'Hair' 9b
  • Allium moly 9b
  • Allium 'Mount Everest' 9b
  • Allium neapolitanum 9b
  • Allium oreophilum syn. ostrowskianum 10b
  • Allium schubertii 9b
  • Allium siculum syn. bulgaricum) 9b
  • Allium sphaerocephalum 10b
  • Anemone blanda 10b
  • Anemone coronaria (De Caen) 10b
  • Camassia cusickii 9b
  • Camassia leichtlinii 9b
  • Chionodoxa forbesii 9b
  • Chionodoxa luciliae 9b
  • Colchicum spp. 11
  • Crocus sativus 9b
  • Crocus speciosus 9a
  • Crocus vernus 11
  • Crocus zonatus 10b
  • Erythronium revolutum 9b
  • Freesia 8-11
  • Fritillaria persica 10a
  • Fritillaria uva-vulpis 9b
  • Hippeastrum papilio (Butterfly Amaryllis)8 - 10
  • Hippeastrum hybrids (Dutch and South African Amaryllis) 8 - 11
  • Ipheion uniflorum 9b
  • Iris danfordiae 9b
  • Iris x hollandica 9b
  • Iris reticulata 9b
  • Lycoris aurea 10b
  • Lycoris radiata 9b
  • Lycoris squamigera 11
  • Muscari latifolium 9b
  • Muscari macrocarpum 9-11
  • Puschkinia scilloides var. libanotica 9b
  • Ranunculus asiaticus 8a - 11
  • Scilla hyacinthoides (syn. campanulata) 10b
The following narcissus are known to do well into zone 10b:
  • Narcissus Accent
  • Narcissus Actaea
  • Narcissus Barrett Browning
  • Narcissus Bell Song
  • Narcissus Carlton
  • Narcissus Chinese Sacred Lily
  • Narcissus Dutch Master
  • Narcissus Fortissimo
  • Narcissus Golden Bells
  • Narcissus Grand Soleil d'Or
  • Narcissus Hawera
  • Narcissus Ice Follies
  • Narcissus Jetfire
  • Narcissus Mount Hood
  • Narcissus Pheasant Eye
  • Narcissus Pipit
  • Narcissus Replete
  • Narcissus Rijnveld's Early Sensation
  • Narcissus Rip Van Winkle
  • Narcissus Tahiti
  • Narcissus Sir Winston Churchill
  • Narcissus Tete-a-Tete
  • Narcissus Thalia
Beginning July through December, you'll find a great selection of fall bulbs for warm climates at GoGardenNow.com.

Monday, June 23, 2008

Answers to FAQS on Bulbs



Q. Why do bulbs often look so different?
A. Bulbs are like other creatures; they vary from genus to genus and species to species. But some "bulbs" look very different from others because they really aren't bulbs at all.

Q. What is a bulb?
A. A bulb is a flattened or compressed stem called a basal plate, usually growing underground, with a growing point on top and surrounded by enlarged, fleshy scales or layers that store food. The layers or scales are the bases of leaves. Roots grow downward from the basal plate. Root scars or dried roots may persist on the bottom of the basal plate. Bulbs may or may not be covered with papery structures called tunics. Tunics help to protect bulbs from drying out. The onion is a good example. Some bulbs do not have tunics. The Easter lily is a good example. Bulbs without tunics lack protection from drying out, so special care must be taken to keep them moist until they are planted.

Q. What are some examples of bulbs?
A. Examples of bulbs include allium (onion), lilium, narcissus, tulip and hippeastrum.

Q. What is a corm?

A. A corm is an enlarged, solid stem, usually growing underground, with a basal plate on the bottom and a growing point on top. This top growing point is called a terminal bud. The stem is divided into sections. The sections are separated by structures called nodes. Other growing points called lateral buds can arise from the nodes along the sides of the corm. If the main growing point is damaged, the lateral buds can replace the terminal bud. Some corms may be covered with papery or scaly remains of leaves.

Q. What are some examples of corms?
A. Examples of corms include gladiolus and crocus.

Q. What is a rhizome?

A. A rhizome is a thick stem that grows horizontally at or just below the soil surface. The stem is segmented by nodes. Roots grow from the bottom of the rhizome. Shoots and leaves may appear along the top and sides of the rhizome.

Q. What are some examples of rhizomes?
A. Examples of rhizomes include cannas, callas and german iris.

Q. What is a tuber?
A. A tuber is a swollen, fleshy portion of an underground stem that lacks a basal plate. A tuber lacks a protective tunic, but has a protective skin. Growing tips or buds appear over the surface of the structure from which shoots and roots may grow.

Q. What are some examples of tubers?
A. Examples of tubers include caladiums, potatoes and oxalis.

Q. What is a tuberous root?
A. A tuberous root is a swollen fleshy, unsegmented portion of a root. Growing buds form at the top end of the root.

Q. What are some examples of tuberous roots?
A. Examples of tuberous roots include dahlias, ranunculus and sweet potatoes.

Q. How are bulbs measured?
A. Bulbs are usually measured in centimeters around the perimeter of the bulb. Thus, tulip bulbs that are advertised as "Size 12/14" are a minimum of 12 to 14 centimeters around the circumference of the bulbs. Some narcissus bulbs are advertised as "Topsize". This simply means that those bulbs are among the largest available for that particular variety. Daffodils are often advertised as "DNI", "DNII", or "DNIII." "DN" means "double-nose" and refers to the fact that multiple bulbs of various sizes are attached at the basal plate. "DNI" bulbs are the largest, and up to three flowers may grow from that bulb. "DNII" bulbs are large and two flowers may grow from that bulb. "DNIII" bulbs are the smallest and least expensive. Fewest flowers will grow from DNIII bulbs. "DN" does not refer to the actual measurement around the circumference of the bulb. However the bulbs are marketed, keep in mind that the largest bulbs cost more but will produce more flowers and be most satisfying.

Q. How are corms measured?
A. Corms are measured in centimeters around the perimeter.

Q. How are rhizomes measured?
A. Rhizomes are usually measured in centimeters length, but the largest are generally advertised as "topsize", which means that the rhizomes offered are among the largest available for that type.

Q. How are tubers measured?
A. The largest tubers available are generally advertised as "topsize", which means that the tubers offered are among the largest available for that type.

Q. How are tuberous roots measured?
A. Tuberous rooted plants may be advertised as "topsize", which means that the plants offered are among the largest available for that type. They may also be advertised according to the size and quality of the "division." A division is a portion of a larger clump that has been cut apart. The largest divisions are often called "#1 divisions."

Q. Is it okay to refer to bulbs, corms, rhizomes, tubers and tuberous roots as bulbs?
A. It depends on the company you keep. Among true friends who aren't trying to prove themselves, you may refer to them as bulbs. If you associate with self-conscious or pretentious persons who are keeping up appearances, you'd better get your terminology right. If you are pushed to the limit, you might refer to your most annoying critics as "fast and bulbous. Got me?"

Q. What are Fall-planted bulbs?
A. Fall-planted bulbs are those that are planted in the Fall for Fall (i.e. fall-blooming crocus) Winter, Spring or Summer bloom. Do not confuse Fall-planted bulbs with Fall-flowering bulbs, though some Fall-planted bulbs such as the crocus mentioned before may actually bloom in the Fall.

Q. What are Spring-planted bulbs?
A. Spring-planted bulbs are those that are planted in the Spring for Spring, Summer or Fall bloom. Do not confuse Spring-planted bulbs with Spring-flowering bulbs, though some Spring-planted bulbs may actually bloom in the Spring.

Q. When is the best time to plant Fall-planted bulbs?
A. Fall-planted bulbs must be planted in the Fall season, usually when soil temperatures drop below 60 degrees F.

Q. When is the best time to plant Spring-planted bulbs?
A. Spring-planted bulbs must be planted in the Spring season. Some of them can be planted as soon as the soil has begun to thaw and is no longer rock-solid. Others must be planted when danger of freezing has passed, or has warmed to about 60 degrees F.

Q. What kind of environment do bulbs prefer?
A. Every guide will recommend that the soil be well-cultivated and well-drained sandy/loam, free of weeds and pests, rich in organic matter and free of stones with a pH between 6.0 and 7.0, and that the average seasonal temperatures and rainfall be nearly perfect. Few such sites exist outside the fertile fields of bulb-producing regions such as The Netherlands, Belgium and Kashmir. But you can do the best with what you have with thoughtful preparation.

Q. How should the planting environment be prepared?
A. Choose a site that meets your bulbs' sun or shade requirements. Then try to replicate the environment of the fertile fields of bulb-producing regions such as The Netherlands, Belgium and Kashmir. Actually, I'm serious. Begin by taking a sample of your garden soil to your local Cooperative Extension Service office. They often provide collection bags. With each soil sample, indicate the type of bulb you intend to grow in it. For the most basic recommendations, you may be charged a nominal fee. For more information such as micro-nutrient and organic content you may be charged more. Follow the recommendations. Poorly drained sites can be improved by raising the height of the planting beds. Clay soils can be amended with gypsum, sand and/or loam. Sandy soils can be improved with organic compost. There is not much you can do about minimum winter- or maximum summer temperatures, so purchase only those bulbs that are recommended for your climate zone. Responsible irrigation practices may help in lieu of optimal rainfall.

Q. What does "naturalizing" mean?
A. "Naturalizing" means growing bulbs in an area where they can grow "naturally", perhaps multiplying and forming colonies as though they are native to the area. It means minimum maintenance. In order to achieve it, your soil and climate zone must be conducive to growth for that particular plant. Daffodils, narcissus and crocus may naturalize open fields and lawns if the climate is to their liking. Similarly, squill and scilla may colonize woodland areas. To be successful, the plants must be let alone to proceed through their own life-cycles without disturbance. In other words, avoid cultivating the soil, and don't mow down the yellowing leaves until they have dried fully.

Q. What kind of soil amendments should I use?
A. The soil amendments you should use depends upon the type of soil you have in need of amending. Common soil amendments include sulphur for lowering pH, limestone for raising pH, sand for helping drainage, clay for slowing drainage, gypsum for breaking up caking clay and compost for enriching the soil. Bone meal is especially good for bulbs. There are others which I don't have the time or space to name. Which you should use depends upon your particular circumstance. Your local Cooperative Extension Service should be helpful.

Q. What kind of fertilizers should I use?
A. There are many bulb fertilizer formulations on the market, each with their own claims to superiority. You may want to experiment with them to see which work best for you. Your soil sample report from your local Cooperative Extension Service will include recommendations based upon the results of the test. Following its instruction should be a good bet. A fine all-around practice for Spring-flowering bulbs is to mix 5 tablespoons of 10-10-10 fertilizer and 2 cups of bone meal per ten square feet area of bulb garden. Repeat the application when shoots appear, but be careful that fertilizer does not come into direct contact with plant tissue. Summer- and Fall-flowering bulbs should be fertilized more frequently but with less fertilizer per application. Apply 2 tablespoons of 10-10-10 fertilizer per ten square feet of garden area every two weeks until flower buds appear.

Q. How deep should bulbs be planted?
A. The proper depth may differ according to the type of bulb. But as a rule of thumb, bulbs should be planted three times as deep as the bulbs are wide. For example, if the bulb is 2" wide, plant it 6" deep. That means the bottom of the hole should be 6" deep.

Q. How deep should corms be planted?
A. The proper depth may differ according to the type of corm. But as a rule of thumb, corms should be planted three times as deep as the corms are wide. For example, if the corm is 2" wide, plant it 6" deep.

Q. How deep should rhizomes be planted?
A. The proper depth may differ according to the type of rhizome. But as a rule of thumb, rhizomes should be planted at or near the soil surface. For example, german iris should be planted with the lower end of the rhizome about 1" below the soil surface, but the top of the rhizome where the foliage appears should be showing just above the soil surface.

Q. How deep should tubers be planted?
A. The proper depth may differ according to the type of tuber. But as a rule of thumb, tubers should be planted 2" to 3" below the soil surface.

Q. How deep should tuberous roots be planted?
A. Most tuberous roots are attached to the growing point of the plants from which leaves appear. This growing point is called a "crown." The crown should be planted at soil level with the tuberous roots spread out below it in the hole.

Q. How should I care for the site after the bulbs are planted?
A. Other than keeping the area relatively weed-free, Fall-planted bulbs require very little care after planting. A 1" layer of mulch is very beneficial. During Spring, when growth begins, regular irrigation is helpful. For most types, the soil should be allowed to dry a bit between waterings.

Q. How should I care for the plants after flowering ceases?
A. After flowering ceases, most bulbs spend a few weeks building food reserves and preparing for dormancy. In order for them to build food reserves, foliage must remain intact and irrigation should continue. The leaves will begin to yellow over time. Though yellowing leaves are unsightly, they must be left alone until they dry and turn brown. After they turn brown, the foliage may be cut off. Avoid pulling dried foliage since the bulbs themselves may be pulled up by accident. Most bulbs, corms, rhizomes and tubers require drier soil during dormancy.

Q. Can bulbs be grown indoors?
A. Yes, bulbs can be grown indoors. Some may require special treatment in order for them to flower. Apart from providing adequate sunlight, moisture, and fertile potting soil, some bulbs may require forcing.

Q. What does "forcing" mean?
A. Many plants require a period of cold weather during dormancy to induce growth and bloom. "Forcing" requires a method to provide that necessary period of cold. The method involves keeping the bulbs in a dark place at a temperature between 40 and 45 degrees Fahrenheit for up to 15 weeks. Paperwhite narcissus do not require a period of cold weather before blooming.

Q. How does one go about "forcing" bulbs.
A. Gardeners living in areas where winters are consistently cold may simply keep their potted bulbs in a covered trench or in a dark corner of an unheated garage as long as the temperature around the bulbs does not go below 40 degrees. Another common method is to store the bulbs at the proper temperature in an extra refrigerator. If you plan to keep them in a refrigerator, make sure that you do not keep fruit in the same place. Fruit slowly releases ethylene gas which will damage the flower bulbs.

Begin by planting the bulbs in well-drained bowls with a superior grade of potting soil. Pots with wider bases are best because they are less likely to tip over. After planting, mark the bowls to identify the bulbs, water well, drain and store. Some of the bulbs may begin to sprout during storage. When 15 weeks have passed, remove the bulb bowls from storage and keep in a cool, dimly lit area. Within a few days, the shoots will appear and turn green. When the shoots have turned green, they can be moved to a bright location to be enjoyed. Keep the soil moderately moist. The flowers may last for three or four weeks.

Q. How do I care for indoor bulbs after flowering ceases?
A. For some bulbs the answer is simple: throw them away. Bulbs that have been forced have usually used up their food reserves for blooming and have been deprived of the opportunity to rebuild them. Even transplanting them in the garden is usually an exercise in futility. Tulips, hyacinths and narcissus are examples.

Hippeastrum, however, are good examples of bulbs that can be grown indoors and brought into bloom again. After blooming, they may be planted in the garden in temperate climates, or one might continue to grow them indoors. When the bulbs are potted, they should be kept slightly moist. Avoid over-watering. When they begin to sprout, they should be fertilized with a balanced slow-release fertilizer. An all-purpose fertilizer should be fine, but some are available that are specially formulated for bulbs. If you choose to use a water-soluble fertilizer, feed them twice per month. Display them in a cool, bright area out of direct sun to encourage a longer bloom period. After flowers fade, allow the stems to yellow and droop. When they have shriveled, cut them off at the top of the bulb. Continue watering and fertilizing as usual until the leaves yellow. When the leaves have shriveled, they can be cut off, the bulbs unpotted and stored for later use.


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