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 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.

Garden tour and plant sale

Each spring members host a garden tour and plant sale 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.


If you have a horticultural question, call University of Missouri Extension at 636-970-3000 to speak with a Master Gardener from 12:30 to 4:30 p.m. on Mondays, April through October, except holidays. Callers at other times of day or night can leave a voice message, which will be returned within 24 hours. Replies are based on sound research.

Speakers bureau

Master Gardeners are available to give presentations to schools, clubs and organizations in the area. See more information, including topics and fees, for the speakers bureau.

Member resources

Resources for Master Gardeners to participate in the organization.