Ongoing research

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Invasive Spotted Lanternfly

The spotted lanternfly is an invasive insect that is currently in the mid-Atlantic United States and has the potential to invade California and have a profound impact on our agriculture and our landscapes.
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Children in cooking class
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NPI Impact Outcome Evaluation

Welcome to Impact Outcome Evaluation, commonly referred to as IOE IOE is the California Department of Public Health CalFresh Healthy Living's evaluation of school-based interventions. IOE is required for all local health departments conducting a minimum intervention of series-based direct education in school…
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Lake Tahoe Basin Weed Management Area

Photo Courtesy of Tony Limas, El Dorado County Photo Library Lake Tahoe's unique character - famed natural beauty, water clarity, diverse wildlife and plant populations, unique ecosystems and limitless recreational opportunities - are valued by both residents and visitors alike.
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Multi-State 4-H Youth Retention Study (YRS)

This multi-state research project, formally known as Understanding Recruitment and Retention in the 4-H Club Program was approved by NIFA-USDA in October 2018. In the pilot year (2014-2015), California and Idaho were involved.
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Urban neighborhood and park.
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Urban & Community IPM Webinars

Join us at noon on the third Thursday of every month to learn about pest identification, prevention, and management around the home, garden, and landscape. This series is free and open to the public but advance registration is required. Please share with others who may be interested.
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A sprayer discharging spray onto tree canopies
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Airblast Spray Advisor

Airblast Spray Advisor web app is a decision support tool designed to enable the pesticide user community (growers, pesticide applicators, etc.) identify best practices for achieving effective and efficacious airblast spray applications.
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Rangeland Summit

Welcome to the home of past Rangeland Summits. The California Rangeland Conservation Coalition (CRCC) with the University of California Cooperative Extension (UCCE) host the Annual Rangeland Summit in January of each year. Past presentations can be found on this site.
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Range and Natural Resource Camp

We are sorry for any inconveniences, we have lost access temporarily to our Range Camp email.  Range Camp is being postponed for 2025 due to scheduling issues.  We do plan to have information here for Range Camp 2026 - which is also the International Year of Rangelands and Pastoralists.  Please check back…
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brown hand trowel and red handled garden clippers with leaves
UC Master Gardeners of Orange County: Event

San Clemente Garden Club Gardenfest 2026

Apr 11, 2026

San Clemente’s Biggest, Best Plant Sale and Garden/Household Goods Flea Market  As you browse through this amazing plant sale and flea market, be on the lookout for the UC Master Gardeners of Orange County.   The team will be teaching you how to sharpen your gardening tools.   Attendees can…
UC Master Gardeners of Orange County
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Tomato Vine with ripe tomatoes
UC Master Gardeners of Orange County: Event

Tomatoes A-Z - Westminster

Apr 9, 2026

Imagine a world bursting with vibrant colors, tantalizing flavors, and endless possibilities—this is the extraordinary realm of tomatoes! From the countless varieties that grace our gardens to the nuances of their cultivation, disease management, and the choice between growing in the ground or in…
UC Master Gardeners of Orange County
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tomatoes
UC Master Gardeners of Orange County: Event

Tomatoes A-Z - Huntington Beach

Apr 8, 2026

You could plant from dawn to dusk and still not plant every variety of tomato! Whether you are a novice or a pro, you’ll enjoy learning about tomatoes: their history and some fun facts, the many varieties, their culture, diseases and pests, growing in the ground vs. growing in containers – and…
UC Master Gardeners of Orange County
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Yellow and Black bumble bee on a violet colored flower
UC Master Gardeners of Orange County: Event

Monarch Nature Trail Huntington Beach

Apr 4, 2026

Family Volunteer Opportunity  Join us on the first Saturday of each month for a morning of outdoor fun at the Monarch Nature Trail in Huntington Beach. Learn about Orange County's butterfly population as well as the native plants they depend on for survival. Volunteer tasks for all ages include watering…
UC Master Gardeners of Orange County
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Green seedlings growing in brown soil
UC Master Gardeners of Orange County: Event

Seed Starting (Make & Take) Brea

Apr 4, 2026

Learn how to grow from seeds the type of plants you want to enjoy in your garden Through this hands-on experience, participants can cultivate a sense of joy and satisfaction as they nurture their plants from seed to flourishing growth. Join us in this rewarding experience and take part in the vibrant…
UC Master Gardeners of Orange County
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Three Tomato Varieties
Napa Master Gardener Column: Article

An Ode to Juliet

March 28, 2026
By Michael Lecours
By Penny Pawl, UC Master Gardener of Napa County. Last year at this time Napa County Master Gardeners were working hard to have an outstanding spring Tomato Sale.  Our effort paid off: the sale, which helps fund our activities, was a complete success and will be held again this year on Saturday,…
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Ceanothus native
UC Master Gardener Program of Sonoma County: Event

Native Trees and Large Shrubs for the Home Garden

May 9, 2026

A few wise choices in planning your home’s landscape can assist a thriving efficient ecosystem and be quite beautiful as well. Providing some shade using larger shrubs and small trees, even if you have limited garden space, can temper heat extremes and provide food for any number of small creatures…
UC Master Gardener Program of Sonoma County
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handful of Soil
UC Master Gardeners of Fresno County: Event

Unlock the Secrets in the Soil

Jun 6, 2026

UNLOCK THE SECRETS IN THE SOIL MG TIM  New advances in soil health have been made and are available to the home gardener.  A healthy garden starts with healthy soil. This class will focus on the USDA program "Unlock the Secrets in the Soil". The four fundamentals of the program and new…
UC Master Gardeners of Fresno County
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Gardening into the future
UC Master Gardener Program of Sonoma County: Event

Gardening into the Future: Climate Adaptation in Your Yard

May 2, 2026

There are positive, impactful actions you can take in your own garden and community to adapt to climate change. This talk offers concrete, achievable, science-based means to use in your own garden for carbon sequestration, food security, plant and animal habitat, and increased resilience in extreme…
UC Master Gardener Program of Sonoma County
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