St Charles County Master Gardeners
Click on address for map.
636-875-7457
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The St. Charles County Master Gardeners Welcome You
The Extension Center Demonstration Gardens​
Bring your camera. Mornings and evenings are great times to stroll. The gardens are open to the public every day during the daylight hours. The Master Gardeners can also provide guided tours in May and early June. See Garden Tours.
Click here for an aerial drone view map.
2026 Plant Sales – Save the Dates!
Saturday, March 14, 9:00 am-noon: Cool Season Plant Sale (Veggies and Pansies)
No reservations required for March 14.
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Saturday, April 25: Spring Plant Sale (Tomatoes, Peppers, Herbs, Annuals, Perennials, and Natives)
Parking lot reservations are required for April 25 Spring Plant Sale shopping.
The Signup Genius link for parking reservations will become active during the week prior to the sale date. Watch this page.
We look forward to seeing you!
Questions: mgstcharles@gmail.com
Educational Offerings
Our Pantry Garden
Our Pantry Garden area, allows our Master Gardeners to learn techniques for growing. A typical year produces over a 2,000 lbs. (a ton) of donated vegetables for a local food pantry.
Click here to see our Pantry Garden page.
Other Activities
Farmers Market
The St. Charles County Master Gardeners will participate in the St. Charles Lions Club Farmers Market on the first Saturday of the month, May through September. Please note that the Market has moved to 370 Lakeside Park, 1000 Lakeside Park Drive in St. Peters.
Stop by and visit us!
Supporting the Monarch Butterfly
The National Garden Bureau has designated 2025 as The Year of the Asclepias (milkweed) and encourages gardeners to plant this attractive and useful flowering perennial which is vital to the survival of the monarch butterfly.
Our Newest Master Gardeners
Introducing the 2025 Core Training Class
St Charles County welcomes the newest Master Gardener classroom graduates. After finishing their hands-on volunteer activities they will complete their training.​
To learn more about becoming a Missouri Master Gardener, visit
https://extension.missouri.edu/programs/extension-master-gardener/training