The most useful book on our recent Pacific Northwest trips has been The Pacific Northwest Garden Tour: The 60 Best Gardens to Visit in Oregon, Washington, and British Columbia by Donald Olson, published by Timber Press in 2014. Now Don Olson has written a companion guide for California: The California Garden Tour: The 50 Best Gardens to Visit … Continue reading A must-have guide for California gardeners and visitors: The California Garden Tour by Donald Olson