St. Charles County

St. Charles County Master Gardeners

The Missouri Master Gardener Program is a public service program offered by Missouri University. Master Gardeners are volunteers that work to extend the knowledge of the University in cooperation with the St. Charles County Extension office. They are a group of highly trained volunteers that teach classes in school gardens, provide advice and education in community gardens, maintain demonstration gardens that illustrate a variety of gardening methods, deliver gardening information to radio stations, and host gardening fairs and seminars for the public. Master Gardeners help others learn about sustainable gardening methods. They provide reliable and research-based horticultural programming Missouri residents. We are members of the local community that have taken an active interest in their lawns, trees, shrubs, flowers and gardens. They are enthusiastic individuals that are willing to learn and help others and are able to communicate with diverse groups of people.


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.

Hortline Volunteering

Plant Sales

Hosted by the St. Charles County Master Gardeners
University of Missouri Extension Center of St. Charles County
260 Brown Road
St. Peters MO 63376

The 2019 plants sales are done for the year. If you would like advance notice of 2020 plant sales, call 636-970-3000 to add your name to the Master Gardener email distribution list.

Cool-season vegetable starts plant sale

2020 dates to be decided; usually held in mid-March.

Warm-season annuals, perennials, herbs, tomatoes and more plant sale

2020 dates to be decided, usually held in late April.

Any resident with an interest in gardening, novice or expert, may take the Master Gardener Core Course. All you have to do is follow these steps:

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    1. Apply to attend the training in a location near you.

    Although 2019 training has concluded, you can receive early notice for 2020 training by calling us and asking to be added to our interested list.

    MU Extension Center
    260 Brown Road
    St. Peters MO 63376

    The fee is $195. Enrollment is limited and registration will be accepted on a first-come, first-served basis. Please complete the Master Gardener Volunteer Agreement (PDF)sign it in the two designated spaces on the second page and return to the extension center by February 20.

    To pay with any major credit card: Call 636-970-3000 and mail the volunteer agreement to the extension center.

    To pay with check: Make your check payable to University Extension Council and mail it to the extension center with the volunteer agreement.

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    2. Submit and pass the background check

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    3. Complete the Extension Master Gardener core training

    30 hours of plant education offered in the fall: August through November

    Courses are taught by Missouri University faculty, local experts & MU Extension educators

    Required reading
    Before applying for Core Training, please read Missouri Master Gardener Program Policies and Procedures (PDF) and Master Gardener Core Training learning objectives (PDF). Topics include: Vegetables, compost and soil, flowers, fruits, turf grass, landscape design, woody landscape plants, plant propagation, integrated pest management, plant diseases and insects. Order of topics is subject to change.

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    4. Volunteer in your community

    Complete the 30-hour internship by December 31 of the following year. Volunteer on projects and at events to teach plants in the community. The training and volunteer requirement is a substantial time commitment, both in and out of class. Please be sure this volunteer activity fits your schedule. If in doubt, you can always apply in future years.

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    5. Stay involved

    Master Gardeners can remain active members in following years by attending six or more hours of continuing education and contributing 20 hours or more of volunteer community service.

    Report your volunteer and continuing education hours online by December 31st of each year.

Master Gardeners moving from other states are evaluated on a case-by-case basis through discussion with the individual, local coordinator, and State Coordinator.

At the heart of the Missouri Master Gardener program is our volunteers. Volunteers assist the University of Missouri Extension Service personnel to extend the educational arm of the university to the public by providing horticultural information based on university research and recommendations. In other words, the Missouri Master Gardener program is a place for volunteers to have a fun, educational experience while serving the community in which they live while doing what they love.

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