Solve a problem related to plants, water, or soil

Problems involving trees, shrubs, and ground covers

Problems resulting from construction activity or mechanical damage

Photo: This valley oak tree is declining

Photo courtesy of Larry Costello.

Symptoms: This valley oak tree is declining.

Diagnosis: Roots have been injured injury by construction several years ago of adjacent buildings and parking lot.

Solutions: To protect a mature tree from mechanical injury, preserve as undisturbed ground all land area beneath the tree's canopy — from the trunk all the way out to the farthest drip line.
Photo: Coast redwood turning reddish brown and dying

Photo courtesy of Larry Costello.

Symptoms: Coast redwood turning reddish brown and dying.

Diagnosis: Mechanical injury to roots from construction of nearby house and perimeter wall.

Solutions: Replant when tree dies.
Photo: Trenching next to this tree will have severe impacts

Photo courtesy of Larry Costello.

Symptoms: Trenching next to this tree will have severe impacts.

Diagnosis: This construction activity will result in removal of many roots and water deficit.

Solutions: Avoid construction activities so close to trees.
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