Tree & Shrub Care

UC Marin Master Gardeners: Page

Under Redwoods

Redwood trees need moisture from rain and fog. Photo: Public Domain Coast redwood trees (Sequoia sempervirens) only grow on the Pacific coast from Big Sur to southern Oregon, where their need for mass quantities of water is met from winter rain and summer fog.

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UC Marin Master Gardeners: Page

Under Oaks

Coast live oak trees (Quercus agrifolia) like wet winters and dry summers. L. Stiles There are 20 oak trees native to California. These stately trees create iconic landscapes, live up to 400 years, and provide tremendous benefits. Oaks are good investments -- for homeowners and the environment.

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UC Marin Master Gardeners: Page

Pruning Trees & Shrubs

Hydrangea. Photo: Annie Spratt, Unsplash This section covers flowering trees and shrubs that have been introduced to Marin and other California counties as a result of European contact. These tend to enter dormancy when days shorten and temperatures cool.

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UC Master Gardeners of El Dorado County: Page

Central Sierra: El Dorado County | Master Gardener | Fruits & Orchards Presentations

Summer Orchard Care (2024) Citrus from Tree to Table (2023) Growing Olives (2017) Online Olive Resources (2017) Pruning & Remedial Pruning of Deciduous Fruit Trees (2012) Selecting & Planting Deciduous Fruit Trees/Citrus Trees Principles of Fruit and Nut Tree Growth, Cropping & Management - T.

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oak root fungus mushrooms on roots of neighborhood street trees

Over the Fence (Alameda County): Article

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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A dark haired woman holds a pesticide bottle in her hand to read it.

Pests in the Urban Landscape: Article

Tree & Shrub Insecticides Limited in New Law

February 11, 2025

By Lauren Fordyce

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.

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A brown, dying shrub in front of a row of healthy green shrubs.

Pests in the Urban Landscape: Article

Wilted plants: lack of water or disease?

February 4, 2025

By Belinda Messenger-Sikes

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.

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