Welcome!

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.

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

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.

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.

UPCOMING EVENTS

What's new in Landscape and Urban Hort?

Gnats in your houseplants?

Yellow sticky traps in a potted houseplant can help monitor for fungus gnats. Photo by Krystle Hickman, UC IPM.

If you've noticed tiny, dark insects flying around your houseplants, you likely have fungus gnats. These tiny flies can be a nuisance indoors and may also damage your plants. Fungus gnats lay their eggs in moist soil and their larvae feed on plant...

September Pest Tips

Just a few more weeks of summer remain! As the weather begins to shift, you may need to adjust your landscaping practices to prevent and monitor for fall pests. The UC IPM Seasonal Landscape IPM Checklist is a monthly guide to help you avoid common pests...

Insecticide Sprays Ineffective for Cockroach Control

German cockroach adult. German cockroach adult. Photo by Jack Kelly Clark.

Nobody wants cockroaches in their home, especially since these pests can cause and worsen allergies in children, transmit diseases and bacteria, and contaminate foods. If you find cockroaches in or around your home, do you reach for a do-it-yourself...

Fleeing Fleas!

A slide from the webinar recording Flea Control and Diseases: Starting from Scratch hosted by UC IPM.

Fleas can be found on pets year-round, but populations tend to increase dramatically in spring and summer when temperatures are warmer. Larvae develop rapidly in areas where temperatures reach 70° to 90°F. Fleas are a major concern for pet owners...

August Pest Tips

Summer is in full swing and while it's been quite hot in many parts of California, it's been very cool in others. That's why UC IPM's Seasonal Landscape IPM Checklist is a useful tool to help you figure out what to do in your region each...