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UC Master Gardeners are volunteers trained and certified by the University of California to provide research-based information about home horticulture and pest management. They serve their communities by answering questions from the public, teaching workshops, leading plant clinics, and speaking on a variety of subjects.

Autumn in Your Garden
It's time to start thinking about a new season in the garden.
Harvest for Neighbors Needs your Donations
Harvesting too many zucchinis?  Overrun with oregano or basil?  Over 40% of San Mateo/San Francisco families are food insecure.  Many depend on local food banks to get by.  Here's a list of food banks that will welcome your harvest and make sure it gets to a family in need of food:
  • Coastside ThumbnailSept22
    Hugelculture: Mother Nature’s Magical Garden Bed

    “Hugelculture?” The name (pronounced “hoo-gull kul-toor”) sounds like it might be anew type of yogurt or maybe an exotic fermented beverage but it's neither of thosethings. “Hügel” is the German word for hill or...

  • Thumbnail August 2022
    Sharing Your Garden Bounty

      Growing more fruits and vegetables than your family can eat is a great gardening “problem” to have. What did you grow last year that you shared with others? You probably won't have to think very long, because sharing is...

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    Amazing Soil: It’s the Answer to Just About Everything

      We're learning a lot about micro-climates and how small variations in temperature, humidity, wind, and other factors determine what grows best in a particular location. There's not much one can do about any of those factors, but there is...

Ask a Master Gardener
Do you need help with your garden? Have a pest problem? Curious about what will grow will in your region? Send us an email and include:
Your Name, Zip Code, Email address, Description of problem or question, the type and age of plant, the specific problem/question, history & details - what the damage looks like (include plant location, sun exposure, irrigation method, fertilization, and insecticide applications.) Please attach photos if available (overall plant, views of pest, leaves, etc.) 
Or visit the Master Gardener Helpline by phone or in person:
Helpline: (650) 276-7430
Email: mgsmsf@ucanr.edu
Mondays: 10am to 1pm
Tuesdays: 10:30 to 1:30pm
Thursdays: 1pm to 4pm
Request a Speaker

Are you looking for a speaker for an upcoming event? UC Master Gardeners can present research-based information on a variety of topics to your organization.

Become a Master Gardener

Any San Mateo or San Francisco County resident with an interest and experience in horticulture and a desire to volunteer for community service may apply.