Don't Throw Away Autumn: What Fallen Leaves Can Do for Your Garden

  

Every autumn, nature delivers one of the finest soil amendments available—and then we spend a surprising amount of time raking it up, stuffing it into bags, and hauling it away.

Fallen leaves are not garden waste. They are part of the garden.

Walk through an old hardwood forest and consider what happens there. No one bags the oak leaves. No one carts away the hickory and maple leaves. Year after year, they fall, accumulate, decay, and return their nutrients to the earth. Beneath them lies that dark, crumbly woodland soil gardeners are forever trying to imitate.

Your garden can benefit from the same ancient process.

Leaves Are Nature's Mulch

A layer of fallen leaves protects the soil much as mulch does. It moderates temperature, reduces evaporation, cushions the earth against pounding rain, and helps suppress weeds.

This is particularly useful going into winter. A covering of leaves can help protect the crowns and shallow roots of perennial plants from sudden swings in temperature. In the South, where winter weather can seesaw from shirtsleeves to hard frost in a matter of days, that insulation can be especially valuable.

Whole leaves can sometimes mat together, particularly large leaves such as sycamore or magnolia. Running them over with a lawn mower or shredding them before use produces a looser mulch that admits air and water more readily.

Spread shredded leaves a few inches deep around shrubs, trees, and established perennials, keeping them slightly away from trunks and crowns.

And there you have it: mulch that costs nothing but a little autumn labor.

Feed the Soil, Not the Landfill

Leaves contain nutrients that trees have drawn from the soil during the growing season. As those leaves decompose, some of those nutrients become available again.

Just as important is their organic matter.

Organic matter helps improve soil structure. In sandy soil, it increases the soil's ability to retain moisture and nutrients. In heavy clay, it helps create a more open, workable structure. Over time, decomposing leaves contribute humus—the dark organic material associated with fertile, living soil.

Throwing leaves away interrupts that cycle.

Keeping them on your property allows some of what the trees borrowed from the earth to return home.

Make Leaf Mold

One of the simplest uses for autumn leaves is also one of the best: make leaf mold.

Despite the rather unappetizing name, leaf mold is wonderful stuff. It is simply leaves allowed to decompose, primarily through fungal activity, until they become a dark, soft, earthy material resembling woodland humus.

Making it can be remarkably uncomplicated.

Pile leaves in an out-of-the-way corner, place them in a simple wire enclosure, or collect them in a ventilated container. Shredding the leaves first will speed decomposition, and keeping them somewhat moist will help.

Then wait.

Nature is not in a hurry.

Depending upon the leaves, moisture, climate, and degree of shredding, the process may take a year or more. The finished leaf mold can be worked into garden soil, spread around plants, or used as a soil-conditioning mulch.

It is especially useful for improving the soil's ability to hold moisture.

Add Leaves to the Compost Pile

Autumn leaves are also excellent "brown" material for compost.

Kitchen scraps, fresh grass clippings, and other green materials tend to be relatively rich in nitrogen. Dry fallen leaves provide carbon. A mixture of the two creates better conditions for decomposition than either material alone.

This presents an opportunity worth planning for.

Instead of putting every autumn leaf into the compost pile at once, save some dry leaves in bags, bins, or a covered enclosure. During the following months, add handfuls or layers whenever you add kitchen scraps or other nitrogen-rich material.

In effect, autumn can provide part of your composting supplies for the entire year.

Shredded leaves decompose more quickly, but whole leaves will eventually break down too. The microbes are patient even when gardeners aren't.

Leave Some Leaves for Wildlife

There is another reason not to make the autumn garden too tidy.

A layer of fallen leaves provides habitat for an astonishing assortment of small creatures. Beneficial insects, spiders, beetles, caterpillars, and other organisms may overwinter among fallen leaves or beneath them. Some moths and butterflies spend part of their life cycles in leaf litter.

Birds know this very well.

Watch a brown thrasher, towhee, or other ground-feeding bird scratching through leaves. It isn't admiring your landscaping. It is looking for supper.

Removing every leaf from every corner of the property can remove some of the shelter and food sources upon which these creatures depend.

That doesn't mean your front walk needs to disappear beneath six inches of oak leaves. There is room for order and stewardship together. Clear the lawn, paths, gutters, and places where heavy accumulations might cause problems, but consider leaving leaves beneath trees, around woodland borders, and in less formal portions of the garden.

A garden need not look abandoned to remain alive.

What About Leaves on the Lawn?

A light scattering of leaves can often simply be mowed into the lawn. A mulching mower chops them into small pieces that settle between the grass blades and gradually decompose.

A thick blanket is another matter.

Heavy layers of whole leaves can block sunlight and air, hold excessive moisture, and smother turf. If you cannot see much grass beneath the leaves, it is probably time to rake, mulch, or collect some of them.

But "collect" needn't mean "discard."

Move them to flower beds. Put them beneath shrubs. Compost them. Make leaf mold. Store them for later.

There is almost always somewhere better for a leaf than a garbage bag.

A Word of Caution

Not every fallen leaf should necessarily be returned directly to the garden.

If plants have suffered badly from certain diseases, infected foliage may harbor organisms capable of causing trouble again. Good sanitation can be an important part of disease management. When dealing with seriously diseased material, determine whether composting, disposal, or another treatment is appropriate for the particular disease.

Also avoid piling leaves thickly against tree trunks, shrub stems, or the crowns of perennials. Mulch should protect plants, not bury them.

As with most things in gardening, moderation and observation are better guides than rigid rules.

The Old Way Wasn't So Foolish

Before plastic bags, municipal leaf collection, and truckloads of commercially packaged soil amendments, gardeners had little reason to regard leaves as rubbish.

They composted them. They piled them. They dug them into gardens. They allowed them to rot beneath shrubs and trees. They understood something that modern convenience can make easy to forget:

A garden produces many of the materials needed to sustain itself.

The leaves falling across your yard this autumn are part of next year's garden.

They can become mulch around your perennials, carbon for your compost pile, shelter for overwintering creatures, organic matter for tired soil, and eventually the dark humus from which new roots will grow.

So rake where you must. Shred where you can. Compost some. Pile some. Leave some beneath the trees.

But don't throw away autumn.

The garden has spent an entire season making it for you.

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The Best Mulches for Every Type of Garden

 

Walk through any thriving garden, and chances are you'll find something covering the soil. Nature seldom leaves bare ground exposed for long. Fallen leaves, pine needles, decaying grasses, and forest litter protect the earth from scorching sun, pounding rain, and drying winds. Gardeners have borrowed this lesson for centuries by using mulch.

Mulch does much more than make a garden look neat. It conserves moisture, suppresses weeds, moderates soil temperatures, reduces erosion, and often improves the soil as it breaks down. The trick is choosing the right mulch for the right place.

Here are some of the best mulch options for different kinds of gardens.

Vegetable Gardens

Vegetable gardens benefit from mulches that gradually enrich the soil while keeping weeds under control.

Straw is one of the finest choices. Clean wheat or oat straw allows water to penetrate easily, keeps fruits like tomatoes and peppers off the soil, and decomposes into valuable organic matter. Be sure to use straw rather than hay, since hay often contains weed seeds.

Shredded leaves are another excellent option. If you collect autumn leaves, store them dry and use them throughout the growing season. They slowly feed earthworms and improve soil structure.

Compost also serves as a mulch while adding nutrients. Spread one to two inches around vegetables, being careful not to pile it directly against stems.

Avoid fresh wood chips directly in annual vegetable beds, as they can temporarily tie up nitrogen near the soil surface while decomposing.

Flower Beds

Perennial and annual flower gardens often benefit from decorative mulches that also improve the soil.

Shredded hardwood bark remains attractive for a long time and resists washing away during heavy rains. It gradually decomposes and enriches the soil beneath.

Pine bark mini nuggets work especially well in beds with shrubs, roses, and established perennials.

For cottage gardens, shredded leaves create a natural appearance while encouraging beneficial soil organisms.

Apply mulch about two to three inches deep, leaving a small gap around plant crowns to prevent rot.

Around Trees and Shrubs

Trees and shrubs appreciate long-lasting mulches that mimic a forest floor.

Arborist wood chips are among the best choices available. Fresh chips containing bark, leaves, and small branches break down slowly, support beneficial fungi, and improve soil over time.

Contrary to old gardening myths, fresh wood chips placed on top of the soil—not mixed into it—rarely cause nutrient problems.

Extend mulch outward as far as practical beneath the tree canopy, but never pile mulch against the trunk. The infamous "mulch volcano" encourages disease, insect damage, and decay. Keep the mulch a few inches away from the bark.

Woodland Gardens

Shade gardens and woodland plantings thrive with mulches that resemble their natural habitat.

Leaf mold—partially decomposed leaves—is perhaps the ideal woodland mulch. It retains moisture beautifully while creating rich, humus-filled soil.

Pine needles also work well beneath acid-loving woodland plants such as azaleas, camellias, rhododendrons, and many native wildflowers.

These materials blend naturally into woodland settings and encourage healthy fungal activity in the soil.

Raised Beds

Raised beds dry out faster than in-ground gardens, making mulch especially valuable.

Compost, shredded leaves, and clean straw all help reduce watering needs while improving soil quality.

Because raised beds are highly managed growing spaces, avoid thick layers that may slow soil warming in early spring. One to two inches is usually sufficient.

Pathways

Garden paths require durable materials that stand up to foot traffic.

Wood chips create comfortable walking surfaces and suppress weeds effectively.

Pine bark nuggets offer an attractive appearance for ornamental gardens.

For permanent pathways, coarse wood chips several inches deep can last for years with only occasional replenishment.

Herb Gardens

Mediterranean herbs such as rosemary, lavender, thyme, sage, and oregano generally prefer excellent drainage.

Use light layers of gravel, pea stone, or small crushed rock around these herbs rather than thick organic mulches. The stone reflects warmth and helps keep stems dry.

For herbs that appreciate richer soil, such as parsley and chives, compost makes an excellent mulch.

Fruit Trees and Berry Bushes

Fruit-bearing plants reward consistent soil moisture.

Wood chips work exceptionally well beneath apples, peaches, pears, blueberries, and blackberries.

Blueberries also appreciate pine bark or pine needles, which naturally complement the acidic soils these plants prefer.

Keep mulch several inches away from trunks and canes to discourage rodents and disease.

Container Gardens

Even containers benefit from mulch.

A thin layer of pine bark fines, compost, or shredded bark reduces evaporation and helps moderate soil temperatures during the heat of summer.

Avoid overly thick layers that may interfere with watering.

Mulches to Use Carefully

Not every mulch belongs everywhere.

• Fresh grass clippings can become slimy and produce unpleasant odors if applied too thickly.
• Dyed landscape mulches are attractive but provide little advantage over natural products.
• Rubber mulch lasts a long time but offers no benefit to soil health and is generally best reserved for playgrounds rather than gardens.
• Plastic sheeting suppresses weeds but prevents rainfall from reaching the soil and contributes nothing to long-term fertility. Organic mulches are usually a better choice for home gardens.

How Much Mulch Is Enough?

For most gardens, two to three inches of mulch provides excellent weed suppression and moisture conservation.

Too little mulch allows weeds to flourish. Too much can prevent air movement and encourage shallow roots or stem rot.

Refresh mulch as it naturally decomposes rather than piling new layers on top year after year.

Let Nature Be Your Teacher

The healthiest forests, meadows, and prairies have one thing in common: bare soil is rare. A protective covering shields the earth, feeds countless organisms below the surface, and creates conditions where plants flourish.

Choosing the right mulch is less about following trends and more about matching the material to the needs of your garden. Whether it's straw in the vegetable patch, arborist chips beneath shade trees, pine needles around blueberries, or compost in raised beds, the proper mulch saves water, builds healthier soil, and reduces maintenance throughout the growing season.

A good mulch is one of the simplest investments a gardener can make—and one that pays dividends season after season.

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Planning Next Year's Flower Beds While This Year's Are Blooming

Use the height of the growing season to spot opportunities, solve problems, and create even more beautiful flower beds next year

It seems almost backward. The borders are overflowing with blossoms, butterflies drift from flower to flower, bees hum contentedly from dawn until dusk, and the garden has never looked more alive. Surely this is the time to sit back with a glass of iced tea and simply enjoy the view.

It certainly is—but it is also the best time to become a better gardener.

One of the greatest mistakes gardeners make is waiting until winter or early spring to plan next year's flower beds. By then, the vivid colors, successful combinations, disappointing gaps, and forgotten ideas have faded into memory. Summer tells the truth about a garden. It reveals which plants thrive, which struggle, where color is lacking, and where improvements can be made.

The finest gardens are rarely created in a single season. They are shaped little by little, year after year, by observant gardeners who are always thinking one season ahead.

Walk Your Garden with Fresh Eyes

Take a slow stroll through your garden every few days.

Don't just admire the flowers. Study them.

Ask yourself questions:

• Which plants are stealing the show?
• Which ones disappear behind larger neighbors?
• Are there empty spaces after spring bloomers fade?
• Are colors clashing or blending beautifully?
• Does the garden have interest from morning until evening?
• Are pollinators visiting certain plants more than others?

Carry a notebook or use your phone to record your observations. Better yet, take photographs from the same locations every couple of weeks. Those images become invaluable references during the winter planning season.

Identify the Empty Spaces

Even beautiful gardens often have awkward gaps.

Perhaps the daffodils finish in April, leaving bare soil until midsummer. Maybe a clump of irises creates wonderful blooms for two weeks before becoming little more than green leaves. Some annuals may have failed entirely after an unusually hot spell.

Summer makes these weaknesses impossible to ignore.

Instead of forgetting them, make notes immediately.

You may discover places where ornamental grasses, late-blooming perennials, asters, salvias, black-eyed Susans, coneflowers, or autumn-blooming sedums could keep the display going well into fall.

A truly memorable flower bed always has something waiting in the wings.

Observe the Sun

The angle of the sun changes throughout the growing season.

A bed that seemed sunny in March may be partly shaded by mature trees in July. Shrubs continue growing, neighboring trees cast longer shadows, and buildings create surprising pockets of afternoon shade.

Spend several days noting:

• Full-sun areas
• Morning sun only
• Afternoon shade
• Deep shade
• Dry spots beneath trees
• Areas where water tends to collect

These observations help you choose plants that naturally belong where they are planted instead of constantly fighting the conditions.

Evaluate Plant Combinations

Some combinations simply work.

Others never quite come together.

Notice which colors make each other glow.

Purple salvias beside yellow coreopsis often create vibrant contrast. White garden phlox can calm an otherwise colorful border. Silver foliage plants soften bright reds and oranges, while ornamental grasses provide movement that flowers alone cannot.

Pay attention to plant height as well.

Did taller plants hide shorter ones?

Did certain plants flop after heavy summer rains?

Would repeating one favorite plant several times create greater harmony?

Professional designers often repeat the same plants throughout a landscape because repetition creates rhythm and unity.

Think Beyond Flowers

Flowers capture attention, but foliage provides structure.

Look for opportunities to include:

• Colorful leaves
• Variegated foliage
• Fine textures
• Bold textures
• Evergreen plants
• Ornamental grasses
• Interesting seed heads

A garden rich in foliage remains attractive even when few flowers are blooming.

Divide and Multiply

Many perennials become crowded after several years.

Summer allows you to identify which clumps have become oversized and which areas could benefit from divisions during autumn or next spring.

Plants such as daylilies, hostas, ornamental grasses, bee balm, and many others can often provide free plants simply by dividing established clumps.

Those divisions become the foundation of next year's expanded flower beds.

Make a Wish List

Every visit to a public garden, botanical garden, or local nursery offers inspiration.

When something catches your eye, don't rely on memory.

Record:

• Plant name
• Bloom color
• Mature height
• Bloom season
• Sun requirements
• Where you'd like to use it

By the time autumn planting season arrives, you'll already have a thoughtful shopping list instead of making impulse purchases.

Consider Bloom Sequence

One secret of exceptional gardens is continuous bloom.

Instead of asking whether a plant is beautiful, ask when it blooms.

Try to create a sequence like this:

• Early spring bulbs
• Late spring perennials
• Early summer bloomers
• Mid-summer favorites
• Late summer flowers
• Autumn stars
• Winter structure from seed heads and evergreen plants

Each group hands the garden gracefully to the next.

Think About Maintenance

Summer also reveals which plants become high-maintenance.

Some require constant deadheading.

Others need staking.

Some spread aggressively.

Others struggle with mildew or insects.

If a plant repeatedly demands far more work than pleasure, consider replacing it with something better suited to your conditions.

Gardening should be rewarding—not a constant battle.

Plant for Pollinators

Watch where butterflies, native bees, hummingbirds, and other beneficial insects spend their time.

Their preferences often surprise us.

Plants that attract heavy pollinator activity deserve additional space in next year's design.

By expanding these favorites, you'll not only enjoy a livelier garden but also help support local ecosystems.

Sketch Your Ideas

You don't need artistic talent.

Draw a simple outline of your flower beds.

Mark existing plants.

Use colored pencils to experiment with moving plants, adding new ones, or repeating favorite groupings.

Winter becomes much less overwhelming when the planning has already begun during the growing season.

Autumn Will Arrive Sooner Than You Think

It may feel as though summer will last forever, but gardeners know how quickly the seasons turn.

The notes you make today become next spring's confidence.

The photographs you take now become valuable reminders.

The ideas you record while flowers are blooming will help you create beds that are fuller, longer-lasting, and even more beautiful next year.

The most successful gardeners aren't simply growing flowers—they're always observing, learning, and quietly planning for the season yet to come.

So while today's blossoms are still at their peak, take a little time to imagine tomorrow's garden. Future-you will be grateful that you did.

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5 tips to help your garden make it through a heatwave

 

Is the current heatwave stressing you out? Think what it’s doing to your plants. Many plants – especially vegetables – need full sun. But during some summers it gets a little ridiculous. If your garden looks like it’s struggling during extreme heat, here are some tips to help you help your garden make it through.

• Water early and water deeply. Mid-day watering might seem like the best time to resuscitate your wilting garden, but it’s not. The hot sun will dry some of the water before it has a chance to percolate into the soil, and the wind might just blow the spray elsewhere. Water in the morning before the day heats up and the wind begins to stir. Water deeply, too. A light sprinkle won’t have a chance to soak much into the soil. Furthermore, roots will tend to stay near the soil surface where the water can be found. Deep watering will encourage deeper root growth.
  
• Add mulch. We can’t say this enough. A couple inches of mulch will help the soil to retain moisture, and mulch helps to suppress weeds, too. Grass clippings, straw, wood chips and chopped leaves are excellent mulch materials. In addition, the rotting organic material will build your soil into a healthier ecosystem.
• Provide some shade. Though many plants need full sun to flourish, a little shade during hot afternoons will protect them when they need it most. Shade cloth is a most popular solution.
• Lay off fertilizing for awhile. Fertilizer – especially nitrogen – encourages plant growth. Active growth stimulation during hot weather is just what your plants don’t need. Let them rest during hot spells, just as you would do yourself.
• Get rid of weeds. Weeds compete with your flowers and vegetables for moisture. Eliminate them. Your garden plants will thank you.

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A question about using landscape fabric.

Q. My lawn maintenance man wants to put down landscape fabric to stop weeds from coming up around my shrubs. Do you think that’s a good idea?

A. I’m not a big fan of landscape fabrics and similar weed barriers, for the following reasons:

• They might prevent weeds from germinating beneath them, but permeable ones don’t prevent seeds from germinating on top and growing down through them; 
• Weed barriers on slopes might not let water perk down through them fast enough, instead letting the water drain where it shouldn’t; 
• Edges of weed barriers can become exposed and tangle in lawnmower blades. 

I much prefer applying plenty of organic mulch.

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What should I use to mulch my creeping phlox?

Creeping Phlox

Q. I received my order of creeping phlox and am very pleased.  Never having planted something I wanted to spread quickly I have no idea what type mulch to use.  John, the bed borders the driveway, slopes downhill and also drops a little toward the drive. I appreciate your time and look forward to your suggestions.

A. Mulches are applied to inhibit weeds, moderate soil temperature, preserve soil moisture, prevent erosion, and make the bed more attractive.

There are two issues for you to consider: the growth habit of the plant and the slope of the bed.

As Phlox subulata spreads, the stems root where they touch the ground. Coarse mulches and inorganic mulches such as recycled rubber might prevent the stems from rooting.

Rainfall on a sloping bed can wash some mulches away. If the bed slopes to the degree that that might happen, you should use a mulch that will allow rain to percolate rapidly through it. In that case, I recommend pine straw mulch. However, a thick application of pine straw might inhibit the stems from rooting as they should. The solution would be for you to pull the pine straw mulch away from the phlox as the plants spread so the stems can contact the soil and take root. The pine straw will eventually decompose.

If the slope of the bed is minimal, and there's no danger of mulch washing away, I recommend pulverized pine bark, wood chips or finished compost.

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FAQ: Is it okay to mulch with...?

Q.  I want to mulch around my flowerbed with the leaves from my yard but I was told by someone that oak and pecan leaves are bad for your garden. Some chemical in them. Is that true? Can I not use them? If I can, what is the best way to use them to add organic matter to my flower beds?

A. Yes, you may rake the leaves directly into the flowerbed around your garden. Oak and pecan leaves contain tannin, an acidic compound very common in plants. Tannin is what makes strong tea astringent. It's also the active ingredient in oak bark traditionally used for tanning leather. Tannin is found in some form in practically every plant family.  While oak and pecan leaves may acidify the soil, the pH can be easily adjusted. If you take a soil sample to the nearest Cooperative Extension Service office for analysis, you'll receive instructions on how to adjust it.

For best results, I suggest you compost your leaves before applying them to your flowerbed.

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FAQ: Do you think recycled rubber mulch is a good choice?

Photo by Magda Ehlers from Pexels

Q. Do you think recycled rubber mulch is a good choice?

A. No, I don't. Rubber mulch is usually made from old tires. While it may seem that recycling rubber in this way is a good idea, I don't agree. Rubber doesn't decompose like organic materials. Decomposed organic materials help to build soil health. Recycled rubber is easy to ignite and difficult to extinguish if set aflame by some means. Furthermore, I don't like the appearance of recycled rubber.

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