Exciting garden-related events for September, 2025

 

 

Here’s a nationwide roundup for September 2025—split between botanical garden happenings and Cooperative Extension programs. 

Botanical garden events (U.S.)

• Brooklyn Botanic Garden (NY) – Gardens for Peace — Sat, Sept 6. Free programming around the Japanese Hill-and-Pond Garden as part of NAJGA’s annual initiative. Brooklyn Botanic Garden

• Birmingham Botanical Gardens (AL) – Fall Plant Sale — Fri–Sat, Sept 5–6. Hundreds of plants grown by Friends volunteers; proceeds support the Gardens. Birmingham Botanical Gardens

• Missouri Botanical Garden (St. Louis, MO) – Gateway West Gesneriad Society Show & Sale — Sat, Sept 6, 9am–5pm. Plus extended evening hours on Sept 4, 11, 18, 25; special programs through the month. Missouri Botanical Garden

• Fort Worth Botanic Garden (TX) – Fall Gallery Night: The Hidden Beauty of Plant Patterns — Sat, Sept 6, 11am–3pm (at BRIT). Fort Worth Botanic Garden

• Desert Botanical Garden (Phoenix, AZ) – Flashlight Nights — Sat, Sept 13, 7–9:30pm (recurring). After-dark trails and desert creatures. Desert Botanical Garden

• Greater Des Moines Botanical Garden (IA) – Fall Bulb Sale (starts) — Sat, Sept 13, 10:30am; plus “Fern Friends” that day and evening happy hours Sept 16. dmbotanicalgarden.com

• Chicago Botanic Garden (IL) – Patterned by Nature Walking Tours; Mosaic Workshop — Tours run weekdays through Sept 19; Mosaic class series begins Thu, Sept 4. Chicago Botanic Garden

• New York Botanical Garden (NY) – NYBG 5K Fun Run / Climate Week — Sun, Sept 21 fun run kicks off NYC Climate Week (Sept 21–27); month view shows ongoing exhibits/markets. New York Botanical Garden+2New York Botanical Garden+2

• Missouri Botanical Garden – Member Speaker Series: The New Romantic Garden — Tue, Sept 23, 11am–12pm; other dinners/performances throughout the month. Missouri Botanical Garden

• North Carolina Botanical Garden (Chapel Hill, NC) – Fall Native Plant Sale — Sat, Sept 27 (members’ preview Fri, Sept 26). North Carolina Botanical Garden

• WSU Master Gardener Advanced Education Conference (virtual, hosted in WA) — While Extension-run, it functions like a garden conference: Fri–Sat, Sept 26–27 (“Cultivating Resilience”). Master Gardener FoundationMaster Gardener Foundation

• People’s Note: Nightmare Before Christmas Light Trail announced for NYBG and Lady Bird Johnson Wildflower Center (Austin, TX) starting Sept 25 (runs into Nov). Family-draw, heavy foot traffic. People.com

Cooperative Extension & Master Gardener events (U.S.)

• Purdue Extension (IN) – Master Gardener State Conference — Sat, Sept 13, Hendricks County; tours, container design, planning, more. Purdue University

• Cornell Cooperative Extension (Columbia–Greene, NY) — Sept 13 Wildlife Enhancement Woodland Walk (Siuslaw Model Forest); Sept 17 Pickling in a Water Bath Canner; Sept 20 Fall Gardening Day; Sept 27 Minimizing Deer Impacts; Sept 28 Composting Made Easy. Cornell Cooperative Extension

• UNH Extension (NH) – Beginning Gardener Series: Gardens in the Fall — Workshop on season extension and fall planting (Sept, date posted under Yard & Garden tag). Extension | University of New Hampshire

• UW–Madison Extension (WI) – Foundations in Gardening (statewide online) — Starts Sept 7 (runs to Dec 6). Good credential-builder for staff/volunteers. Extension Dane County

• Texas A&M AgriLife Extension – Wood County Herb Festival — Sat, Sept 13, 8am–2pm (education sessions, vendors, food trucks). Texas Master Gardener Program

• Texas A&M AgriLife Extension – Smith County Herb Fest (Quitman, TX) — Sat, Sept 13, 8am–2pm (Master Gardener event). Smith

• Texas A&M AgriLife Extension – Plant Party (South Texas Rangelands webinar) — Wed, Sept 17, 10–11:30am CT. South Texas Rangelands

• UF/IFAS Extension (FL) – Palms Workshop (Orange County, Orlando) — Thu, Sept 18 (in-person workshop covering biology, diagnostics, care). What's Happening Around Florida

• UF/IFAS Extension (FL) – Regional Fall Plant Sales & Programs — Sept 19–20 Florida Museum Fall Plant Sale (Gainesville); Sept 20 Okaloosa MGV Fall Plant Sale (Ft. Walton Beach); ongoing Sept series in the Panhandle. Gardening Solutions

• UC Cooperative Extension (Riverside County, CA) – Home Gardening 101 (in-person) — Three Saturday sessions in September (9am–1pm). UC Agriculture and Natural Resources

• Texas A&M AgriLife (Williamson County, TX) – Hands-On in the Garden: Fall Lawn Care — September session outdoors at the Georgetown Demo Garden. Texas Master Gardener Program

• Guadalupe County Master Gardeners (TX) – Lunch & Learn: Hobby Greenhouses — Wed, Sept 10 at the AgriLife Extension Office (Seguin). Guadalupe County Master Gardeners

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