UC Cooperative Extension
ACP (Asian citrus psyllid) found in San Joaquin county
Who We Are
Across California, the University of California’s 64 Cooperative Extension offices are local problem-solving centers. We are the bridge between local issues and the power of UC research. Our county-based staff is part of the community – we live and work in the areas we serve.
More than 300 campus-based specialists and county-based farm, home and youth advisors work as teams to bring practical, unbiased, science-based answers to problems across California.
As part of the agricultural community, we help farmers develop more-efficient growing methods, solve pest management problems and develop crops and irrigation methods that use less water.
As stewards of the land, we help develop smart water-use strategies, develop wildfire education and help preserve natural areas and farmland.
As advocates for healthy communities, we promote healthy diets and exercise for better health, help Californians learn to choose the most nutritious foods and help shape the citizens of tomorrow through the 4-H Youth Development Program.
And thousands of volunteers extend the reach of our work through the Master Gardener Program and the California 4-H Youth Development Program.
We work in full partnership with federal, state, county and private resources.
We are stewards, problem-solvers, catalysts, collaborators and educators.
We are UC Cooperative Extension.
Bees are known to prefer yellow and blue flowers, but pink suits them just fine, too. Here's proof: Two honey bees nearly collide over a pink zinnia. Another honey bee burrows into a pink oxalis. A young honey bee takes a liking to a pink...
The 10th annual National Pollinator Week ends Sunday, June 25, and what an opportunity it's been to showcase our pollinators! As noted entomologist May Berenbaum pointed out, it's "a celebration of Earth's 100,000-plus animal species that, by...
It's National Pollinator Week and you might be wondering where your pollinators are. “I'd love to attract honey bees, bumble bees and other pollinators, but what can I do?" you ask. "Where do I start?" So we asked world-class garden...
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Brent A Holtz Ph.D.
San Joaquin County Cooperative Extension
Robert J. Cabral Ag Center
2101 E. Earhart Avenue, Ste 200, Stockton, CA 95206
Phone: (209) 953-6100
Fax: (209) 953-6128
Click here for a map
Future water leaders soak up irrigation information
Posted 6/23/2017 - University of California students are taking a long journey through California to trace the state's complicated and critical water supply. The recent graduates and upper-division co-eds from UC Merced, UC Santa Cruz, UC Berkeley and UC Davis are part of...
Bee knowledgeable: Pollinator Week is June 19–25, 2017
Posted 6/20/2017 - Bees are the most important pollinators of California agriculture — helping farmers grow field crops, fruits, nuts, and vegetables. Honey bees receive most of the credit for crop pollination, but many other kinds of bees play an important role as...
Better soil boosts farm profit and benefits the planet
Posted 6/12/2017 - Healthy soil does much more than hold plants upright on the surface of the earth. It is a mix of mineral bits and old plant particles teeming with microbes to form a mysterious and complex web of life scientists are just beginning to understand. While...
Looking to hire a maintenance gardener? Make sure they are DPR certified
Posted 5/31/2017 - Memorial Day Weekend has just passed, bringing with it the unofficial start of summer. The warm weather we've recently experienced following a rich rainy season is the perfect combination for the luscious growth we see in lawns and landscapes. Business...
Graduate Students in Extension study key California concerns
Posted 5/23/2017 - In 2013, a group of graduate students in the Department of Environmental Science, Policy, and Management (ESPM) at the University of California, Berkeley sought out faculty support and successfully collaborated with UC Agriculture and Natural...