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Become a Master Gardener

The St. Louis area Master Gardener volunteer training program is the result of a partnership between University of Missouri Extension and the Missouri Botanical Garden. Those who complete the course become certified Master Gardeners after they complete 40 volunteer hours at sites associated with the Missouri Botanical Garden, other horticulture organizations, or the communities where they live.

Class of 2023

Trainees are supported by MBG staff while volunteering at Garden sites and by MU Extension while working elsewhere in the community. 10 hours of continuing education are also required to become a certified Master Gardener. These requirements must be renewed annually to maintain active Master Gardener status.

Our training classes cover a variety of horticultural topics. Missouri Botanical Garden staff, University of Missouri Extension faculty and qualified professionals in our community teach classes in the following topics:

 

A lot of studying will be required to pass the course. 10 hours outside of class per week is common. Students will need to have access to a computer to communicate with the instructors by email and take one test online each week. An additional test each week is taken in the classroom. Students are expected to attend all 18 sessions.  

Registration for the 2025 St. Louis Master Gardener Training will be open in October.  The afternoon session registration will be open on October 17th and the evening session on October 24th.  Registration links will be posted on www.stlmg.org and www.mobot.org on October 1st.   Both sessions of the 2025 training will begin on Thursday, January 9th. 
 
This is a volunteer training program and volunteering is a requirement. Please contact Holly Records recordsh@missouri.edu for more information.
The Master Gardener Volunteer Training Program is not meant to be used as a professional certification. Participants receive basic instruction that cannot compare to a 2 or 4-year degree or other professional credential like ISA Certified Arborist®. Master Gardeners do not advertise their certification status for commercial purposes.