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Master Gardener Helpline - Here to assist you!

Help Desk
UC Master Gardeners staff a Helpline serving Mariposa County, including Greeley Hill, Coulterville and Lake Don Pedro. Our volunteer staff promotes successful and sustainable gardening practices by providing home gardeners with research-based information from the University of California and other academic or government institutions. The staff has access to an extensive library, University of California Agricultural Advisors, university internet sites and a microscope for researching home gardening problems. Home gardeners can bring their questions or specimens in or contact the Helpline by phone or email.

Office Location:

UC Cooperative Extension Office,

5009 Fairgrounds Road

Phone: (209) 966-7078

Email: mgmariposa@ucdavis.edu


March - September:

Tuesdays   9:00 am to Noon and

Thursdays  2:00 pm to 5:00 pm 

Winter Hours October - February:

Thursdays 2:00 pm to 5:00 pm

Messages and emails will be promptly responded to.

In addition, gardeners may bring their questions to the UC Master Gardener Booth at the Farmers Market each Wednesday from May to October, 5:00 - 6:30 pm.

Ask a Master Gardener online!

Click here to be linked to our new online UC Master Gardener eClinic!  Your questions will be forwarded automatically to our Helpline volunteers.