Most of us know good arborists, landscapers and tree care businesses; so please let us know who you recommend and why. We want to create a list that will be valuable for all of us. Send us your referrals, and we’ll add them to the list.

Here’s a list of arborists and what to look for in arborists as published on the Canopy website.
http://canopy.org/caring-for-trees/arborist-list

Arborists Specializing in California Native Oaks
In addition to those recommended by local organizations and neighbors, here are some other sites that can be helpful.

The American Society of Consulting Arborists (ASCA) will help you find a Consulting Arborist.
http://www.asca-consultants.org/find/directorySearch.cfm

The International Society of Arboriculture can help you find an “ISA certified arborist” or verify whether an arborist is ISA certified.
http://ww2.champaign.isa-arbor.com/findanarborist/arboristsearch.aspx