Tree care | UC Agriculture and Natural Resources

Want to know about selecting street trees or fruit trees? Are your trees dying? Here is information on care, selection and pests and diseases of trees in Alameda County.

An unhealthy street tree with a mix of living and dead branches

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Why Is My Tree Dying? Common Causes and How to Save It

April 11, 2025

By Jim Farr

Worried your tree is dying? Learn how to spot signs of distress and what steps to take to identify the cause and possibly save it.

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Discoloration of a kiwi vine suffering from crown rot

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Landscape Trees: Managing Phytophthora Root and Crown Rot

March 18, 2025

By Judy Quan

Learn about one of the major diseases associated with poor water management, Phytophthora root and crown rot.

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oak root fungus mushrooms on roots of neighborhood street trees

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Landscape Trees: Managing Oak Root Fungus (Armillaria)

February 19, 2025

By Judy Quan

Learn about one of the major diseases associated with poor water management, oak root fungus (Armillaria root rot), and what you can do about it.

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Collage of photos of Spotted Lanternfly eggs, young (various instars) and adults

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Invasive Plants and Pests - Tree of Heaven and its Buddy, the Spotted Lanternfly

November 3, 2024

By Linda Carloni

Learn how to identify and manage the invasive Tree of Heaven with guidance from UC Master Gardeners of Alameda County. Protect your landscape today!

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healthy urban street trees in a residential area

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Street Trees -- Selecting, Planting, Caring for Trees

May 14, 2024

By Judy Quan

Our expert guide to selecting, planting, and caring for street trees in Alameda County. Tips on site evaluation, approved species, and proper care.

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