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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?

Thanksgiving or Christmas cactus? Are they the same species?

Schlumbergera truncata - thanksgiving cactus

With only a few short weeks between Thanksgiving and Christmas and two very similarly looking plants, you may be wondering whether the gift a loved one gave you for Christmas is a Thanksgiving cactus or a Christmas cactus. (Many sold in local nurseries...

Save the Date: Giving Tuesday is December 1

Our mission to help Californians continues despite the COVID-19 pandemic. With your help, we provide practical, trusted pest management answers to people like you across our state. Support the work of the UC IPM Urban and Community Program with your...

What makes a weed an invasive plant?

Invasive pampasgrass (Credit: J DiTomaso)

Weeds are usually thought of as native plants we don't want in areas such as landscapes, fields, or vegetable gardens either because they reduce economic output or they are considered aesthetically displeasing. Invasive plants are generally non-natives...

Rodent Awareness Week

Rodent Awareness Week (October 18-24) is a campaign created by the National Pest Management Association to educate the public about the potential harm associated with rats and mice. In addition to damage to structures and property, rodents can transmit...

Fall Weed Management in Lawns and Landscapes

As the days get shorter and the temperatures begin to cool, now is the time to practice weed management for annual cool-season weeds. It's also not too early to consider management for weeds that emerge in springtime. Using integrated pest management...