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?

May Pest Prevention Tips

May is here and with all the fluctuations in our weather lately, there is a lot going on in the landscape! Follow these general tips for the month of May to prevent pests. To see more tips specific to your region, visit the Seasonal Landscape IPM...

Is the Multicolored Asian Lady Beetle Bad?

You can distinguish the multicolored Asian lady beetle from other common lady beetles by looking for the distinct dark M- or W-shaped marking on the prothorax, behind their head. Photo by Jack Kelly Clark.

The multicolored Asian lady beetle, Harmonia axyridis, has a bad reputation. There is a common myth online that this lady beetle (ladybug) is invasive and aggressive, which can sometimes lead to people killing these beetles. While this species of lady...

Grubs in your garden?

Grub size can be helpful in identification. Common white grub species left to right are: Japanese beetle, European chafer, and June beetle. Photo by David Cappaert, Bugwood.org

While preparing your garden for planting this spring, you may have found white grubs in the soil. Discovering these fairly large, white grubs can be alarming, but they usually won't cause significant plant damage. Grubs are the soil-dwelling...

April Pest Prevention Tips

Visit the UC IPM Seasonal Landscape IPM Checklist for a list of pest prevention activities for each month.

Spring is here and if you are like us, you can't wait to get outside and see how your plants and garden are doing! As usual, UC IPM has useful tips for the month of April to prevent pests in the garden and landscape. To see more tips specific to your...

Easter Egg Hunt Answers!

Leaffooted bug eggs. Photo by David R. Haviland, UCCE.

Below are answers to UC IPM's 2024 insect Easter egg hunt! Click on the name of each insect to learn more. A. Brown marmorated stink bug These eggs belong to the brown marmorated stink bug (BMSB) a pest of many types of plants and occasional...