Garden Troubleshooting

UC Master Gardeners of Placer County: Page

About Master Gardeners

About Master Gardeners Our mission as University of California Master Gardener volunteers is to extend research-based sustainable gardening and composting information to the public through various educational outreach methods. We strive to present accurate, impartial information to local gardeners so they…
View Page
UC Master Gardeners of Central Sierra: Page

Central Sierra | Master Gardeners | Becoming a UC Master Gardener

Select your county, below on the right, to get more information on applying to their Master Gardener training program. Contribute to your community every year Master Gardeners contribute several thousand hours of volunteer service educating our communities about sustainable gardening.
View Page
Primary Image
Banner weeds
UC Marin Master Gardeners: Page

Weeds & Invasive Plants

Lambert Yuri, Unsplash > Types of weeds > Life cycle of weeds > How to identify weeds > Managing weeds > What to do when you already have weeds > What you should know about weedkillers > How to prevent weeds Weeds are generally defined as any plant growing in a place where you dont want it, or a pla...
View Page
UC Master Gardeners of Merced County: Page

Become a Master Gardener!

The application process for the UC Master Gardeners of Merced County's 2026 Training Class is now open. Any Merced County adult resident with an interest in horticulture (plants, lawns, trees, vegetables and more) and public service are encouraged to apply for the Master Gardener Program.
View Page
UC Master Gardeners of Amador County: Page

Central Sierra: Amador County | Master Gardener | Classes & Events

UC Master Gardeners of Amador County's ClassesUC Master Gardeners offer free classes on various gardening topics throughout the year.  Check our calendar for upcoming classes each month. Calendar of EventsFor more information contact the Master Gardeners 10am to noon, Tuesdays,…
View Page
UCCE Humboldt - Del Norte Counties: Page

Invasive Plant Species

Invasive plants are one of the greatest threats to croplands, rangelands, aquatic areas, and wildlands in the United States; they degrade the productivity and biological diversity of all ecosystems. Below are the sixteen most harmful weeds in Humboldt County.
View Page
UC Master Gardeners of Merced County: Page

Support UC Master Gardener Program of Merced County

Donate to the UC Master Gardener Program in Merced County, which provides information to the public on home gardening, pest management, and sustainable landscaping practices to Merced county residents through: Monthly free workshops to the community, Free individual advice through our Help Line, Information…
View Page
UC Master Gardeners of Tuolumne County: Page

Hotline Gardening Questions

To get foothill-specific gardening advice, contact the UCCE County Master Gardener of Tuolumne County Hotline at: Phone: 209-533-5912 or Email: mgtuolumne@ucdavis.edu Master Gardeners do check the hotline on a frequent basis.
View Page