Landscaping Around California Native Oaks - - Cal...

The most critical area for an oak's health is the , which extends from the trunk to the drip line and often 1.5 times beyond. Landscaping Around California Native Oaks - CNPS-SCV.org

Landscaping around California native oaks—such as the ( Quercus agrifolia ), Valley Oak ( Q. lobata ), and Blue Oak ( Q. douglasii )—requires a delicate balance between aesthetic design and the strict biological needs of these keystone species. Because these trees are adapted to California's Mediterranean climate of wet winters and dry summers, the primary goal of landscaping must be to protect the root system from excessive summer moisture and soil compaction, both of which can lead to fatal diseases like Oak Root Fungus ( Armillaria mellea ) and Crown Rot ( Phytophthora ). 1. The "Ten-Foot Rule" and Root Zone Protection Landscaping Around California Native Oaks - Cal...