University of California

Environmental Horticulture in San Joaquin County

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beneficial syrphid fly
The Professional's Guide to Sustainable Landscaping

Resources to help you:

  • Minimize chemical fertilizers and pesticides in the environment through INTEGRATED PEST MANAGEMENT
  • Use water conservatively
  • Build and maintain soil health
  • Eliminate non-storm run-off to storm drains
  • Use plants appropriate for their space, use, and climate
  • Minimize green waste to the landfill
  • Provide food and shelter for beneficial wildlife


Course for professional maintenance gardeners

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Taught in 3 Modules, this course teaches practices that will help you improve the health of landscapes, conserve natural resources, and provide a tool to market yourself as a San Joaquin County Green Gardener!

Next course begins FALL 2019. FIND OUT MORE by clicking HERE.

Click for a list of San Joaquin County Qualified Green Gardeners for download


Reduce pollution with proper fertilizer timing

Reduce pollution with proper  fertilizer timing
Applying nitrogen and phosphorus with irrigation water is a common practice in the Imperial Valley. If the fertilizers are applied incorrectly, the nutrients end up in the drains rather than in the crop. Nitrogen and phosphorus are the two main nutrients that cause eutrophic conditions (high algal biomass and low dissolved oxygen concentrations that cause massive fish kills) in the Salton Sea. Current and proposed federal water quality standards for California require growers to improve the quality of drainage waters. To achieve both federal and state water quality objectives, growers will have to reduce the amount of phosphorus that reaches the drains and the Salton Sea.

Read about: Reduce pollution with proper fertilizer timing | View Other Stories

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In the News

Sacramento's Capital Park drastically reduces pesticides through IPM

Capitol Park in Sacramento is one of the capital region's greenest places.

Its 40 acres are blanketed in lush lawns and adorned with an abundance of shrubs and flowers, including renowned rose and camellia gardens, and more than 1,000 (about 200 varieties) of trees. Yet visitors may be surprised to know that this botanical delight is cared for by staff who hardly use any synthetic chemical pesticides.

Click Here for the full story | View All

New disease in CA Native nursery plants

A new disease coming from potted specimens of some California native species is showing up and carrying disease to the landscape.

Read More | View All


CLICK HERE to visit our UC Master Gardener website
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Extension Horticulture Research

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