I always look forward to new books intended for Pacific Northwest gardeners. Paul Bonine and Amy Campion’s “Gardening in the Pacific Northwest” has been long anticipated, and it doesn’t disappoint. As explained in the introduction, this book is mostly from Bonine’s perspective, as he grew up here and has gardened in this region for many years. Campion did most of the excellent photography.
I found myself reading this book out of order, starting with the final chapter titled “Design: Northwest Garden Style.” Intended as an introduction to design styles, this essay is also an excellent, local history of ornamental gardening and why our gardens look the way they do.
Keeping this in mind, I returned to the introductory chapters on climate, soils, and garden culture with a better understanding. Here, I found the authors’ selection of climatic sub-regions especially interesting. As expected, Seattle is part of the Puget Sound sub-region, but Portland and its immediate suburbs have a sub-region of their very own, totally surrounded by the Willamette Valley sub-region. While I was at first surprised by this, after reading the distinguishing factors, I decided these divisions make a lot of sense, and will help gardeners make better plant selections.
The plant encyclopedia is especially good for woody plants. While most species are represented by a single cultivar, these are excellent selections. After admiring Albizia julibrissin ‘Summer Chocolate’ at a couple of Portland gardens last summer, I appreciated learning why it is rarely seen around Seattle. Our immediate sub-region “normally doesn’t receive enough summer heat for its wood to harden off properly in preparation for winter’s cold, leaving it vulnerable to even mild freezes.” Tips like these, make this selection of plant varieties especially valuable.
Excerpted from the Spring 2018 Arboretum Bulletin.