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?

End of the Year Thank You!

maggi o'neill

As 2020 comes to a close, I'd like to express my deep appreciation and thanks to all of our UCCE San Bernardino County Master Gardener volunteers who have given the ‘gift of their time' to provide credible information to the gardening public. Even...

Garden and Landscape Books On Sale


Give the gift of knowledge this holiday season! Save up to 60% on select UC ANR gardening and landscape pest management publications now through December 11.     Pests of the Garden and Small Farm, 3rd Edition   This...

Stop using Weed Slayer 12/4/2020

This is especially important if you are an organic grower or manage areas that are not supposed to be treated with synthetic herbicides THE MESSAGE BELOW IS FROM THE California DEPARTMENT OF FOOD AND AGRICULTURE CDFA ISSUES STOP USE NOTICE...

Support UC IPM on #GivingTuesday!

Woman in Sunflowers with Basket

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

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...

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