Tree & Shrub Care

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.

As of January 1, 2025, popular lawn and garden pesticides belonging to the neonicotinoid class, can no longer be used by home gardeners on outdoor fruit trees, lawns, or ornamental plants in California.

A well-watered plant that suddenly wilts or unexpectedly drops its leaves could be infected with the soil pathogen Phytophthora. The disease it causes, Phytophthora root and crown rot, can affect many plants, including ornamental trees and shrubs, fruit trees, and vegetables.

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

Learn how to water your landscape trees and shrubs properly to keep them healthy and thriving year-round in Alameda County.

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