Ongoing research

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Orange and black Monarch Butterfly on Queen Anne's Lace white flower
UC Master Gardeners of San Diego County: Article

Butterflies Brochure

April 26, 2026
By the Master Gardener Association of San Diego County
Advice to Grow ByUC Master Gardeners of San Diego CountyHotline (858) 822-6910 www.MasterGardenerSD.orghelp@MasterGardenerSD.orgWhat's Special About Butterflies? Pollinators are critical to our landscape, food supply and economy.Pollinators include: Birds, bats, bees, butterflies, beetles, and other…
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UC Master Gardener Program of Contra Costa County: Article

Vegetable Planting Guide for Interior Regions

April 26, 2026
By Ask A Master Gardener
 IntroductionWelcome to our Vegetable Planting Guide for Interior Regions of Contra Costa County. We hope this information inspires you to try many different vegetables in your home garden!How to Use This Planting GuideUse this Planting Guide if your garden is in one of the interior regions of Contra…
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Cool Season Vegetables Gardening, Laura Westley
UC Master Gardeners of Santa Clara County: Event

Growing Cool Season Vegetables starting in Late Summer - Los Altos

Event Date
Jul 15, 2026

Starting from seed, August is the time to start seedlings for Fall vegetables. We are so fortunate we can grow cool season vegetables in Santa Clara County. With our cool (but not cold) rainy season we can grow all sorts of vegetables like greens such as lettuce, chard and kale, to cruciferous veggies like…
UC Master Gardeners of Santa Clara County
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Garden-to-Glass: Refreshing Waterwise Infusions; Chat GPT
UC Master Gardeners of Santa Clara County: Event

Garden to Glass : Refreshing Waterwise Infusions - Los Altos

Event Date
Jun 17, 2026

Discover how to create a garden space - or even a single container - as a source of fresh, aromatic ingredients for summer drinks and herbal teas. This engaging talk takes you on a journey from seed to shaker, with practical guidance on propagation, waterwise plant selection for water conservation and…
UC Master Gardeners of Santa Clara County
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UC Master Gardener Program of Contra Costa County: Article

Mulch

April 26, 2026
By CoCoMG Helpdesk
IntroductionMost mulches help suppress weeds, retain moisture and heat, and can often neaten up a landscape’s appearance. Organic mulches such as shredded bark, bark chips, and redwood chips are plant-based materials that offer a slow release of nutrients into the soil. It is important to note that because…
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Roses, by MG Martha Carpenter
UC Master Gardeners of Santa Clara County: Event

Rose Diseases and Disorders in Home Gardens - Online

Event Date
Aug 20, 2026

Roses are popular ornamentals in many home gardens and are usually healthy when grown in an optimal spot and well-cared for. But roses can be infected with plant diseases and suffer from disorders. What do you do when your roses don't look good? Is it a disease? A disorder? Learn how to tell a disease apart…
UC Master Gardeners of Santa Clara County
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Repairing your irrigation
UC Master Gardeners of Solano County: Event

How to Fix Your Irrigation Leaks

Event Date
Jun 11, 2026

Presenters: Elise Shtayyeh (Associate Water resources Specialist) and Maureen Clark (Solano MG) Learn how to save water by repairing your irrigation system leaks. Photo Courtesy of AxxLC at Pixabay  Event flyer
UC Master Gardeners of Solano County
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UC Master Gardeners of San Diego County: Page

Soil Testing Resources

Verified Soil Testing Laboratories San Diego County Agricultural Weights & Measures – Verified 6/6/23. No longer offer testing services or soil nutrient analysis for San Diego County residents. They suggest use of the appropriate probe to self-test for pH. A&L Western Agricultural…
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