Center for Landscape & Urban Horticulture
University of California
Center for Landscape & Urban Horticulture


Oak Trees on Golf Course
Welcome to the Center for Landscape and Urban Horticulture (CLUH), an information resource of the University of California Cooperative Extension (UC Cooperative Extension). The CLUH supports UC Cooperative Extension educational and applied research programs serving California's environmental horticulture industry. This site features science-based information on:


Please review our Mission Statement.


Low Water Landscape
For the latest science-based information on landscape water needs, please visit our pages under Landscape Water Conservation and Irrigation Management.




Cactus Garden LA Arboretum
Information is contributed by University of California Cooperative Extension scientists. All content is reviewed by these or other experts to assure it is authoritative and science-based. Featured are summaries of technical topics, fact sheets, newsletters, reports, commentary, and web links.



Calif. water use pie chart 2015
THE 9%: Landscape irrigation accounts for just 9% of water use in California, yet landscapes are under relentless attack as California confronts ongoing drought.  The facts presented here show how these attacks are misguided and that there are ways to conserve water without degrading landscape plantings.


Does the landscape you manage have a water budget or water conservation goal that seems impossible to meet? Read about Five Simple Steps for Conserving Landscape Water.



For Home Gardening information and resources, please visit the University of California Garden Web 

Raised Bed Gardening


What's new in Landscape and Urban Hort?

Haunted Halloween Hunt


It's spooky season and we wanted to share a few of our favorite Halloween horror themed pests you may see now, or at other times of the year. Take a guess at what these haunted photos might be and come back on Halloween to see the...

Swarming Termites Looking for Love

western subterranean termites

It's that time of year again: termite swarm season! Western subterranean termites, Reticulitermes hesperus (species complex), produce reproductive swarms during calm sunny periods immediately following the first autumn rains. This is especially...

Webinars Now on YouTube

What is IPM

We are pleased to announce our new YouTube playlist for the Urban & Community IPM Webinars. Currently available recordings include: What is IPM? Navigating the UC IPM Website and New Features Springtime Household Pests Plant Diseases and...

New Resources for Herbs and Vegetables

Oregano plant in pot.

Now is the time for planting cool-season vegetables like broccoli, carrots, and spinach. We are pleased to share new pest management resources for other cool season vegetables including beets, chard, radishes or turnips. If you're planting herbs, we've...

Benefits of Horticulture and Human Interactions

seeds of joy 10

“To forget how to dig the earth and to tend the soil is to forget ourselves.” Mohandas K. Gandhi, World leader, political ethicist, lawyer “Everything that slows us down and forces patience, everything that sets us back into the slow...

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