Master Gardeners

The St. Charles County Master Gardeners are trained individuals who enjoy learning and sharing their expertise with others. Our gardening backgrounds range from hobbyist to professional, from beginner to experienced, from young adult to senior citizen. The common bond is a love of gardening, learning and sharing. More training info.

After training, Master Gardeners serve as a resource with University of Missouri Extension to give county residents research-based answers to their gardening questions. The primary purpose of a Master Gardener is to volunteer, but members rate camaraderie and learning opportunities as important reasons for participating.

Community service

Demonstration gardens

A place for residents to learn about plants that do well in St. Charles County, as well as to see gardening techniques and methods. Learn more about the demonstration gardens. Garden map (PDF)

Garden classes

Timely topics to help you achieve the results you want for your lawn and/or garden are offered at various events throughout the year. Classes are taught by Master Gardeners. Call 636-970-3000 to receive advance notice of garden class events.

Plant sales

Each year members host plant sales on site at the extension enter. The activities and demonstrations vary each year but always offer the opportunity to learn. Plants are sold at reasonable prices and include bedding plants, bulbs, natives and other seasonal plants. Cool-season vegetable starts are sometimes sold in spring and/or fall depending on available volunteers. Get advance notice of the sale dates and other educational offerings from the Master Gardeners by adding your name to our email distribution list--Call 636-970-3000.


Do you have a question about your lawn, garden, trees or plants? You can call the Hortline, which is staffed by Master Gardeners April through October, to get answers based on sound research. Call 636-875-7457 or email your question(s) – a Master Gardener will be happy to help you.