Straight out of college, I worked briefly for a wholesale nursery that grew landscape stock, which included boxed trees. We also recycled a few trees, particularly from the abandoned homes in the neighborhood around the nursery. (The neighborhood, including the nursery, were in the easement of the Norman Mineta Freeway, which in the process of being constructed at the time.) I had believed that the boxed and recycled trees were for ‘instant’ landscapes, the sort that were for clients who did not want to wait for things to grow. It made sense, particularly in our region where so few stay in the same home long enough for trees to mature.

Many trees were good candidates for growing in boxes. Some were naturally small trees. Others had fibrous root systems that did not mind the confinement. Japanese maple, crape myrtle, purple leaf plum, flowering cherry, flowering crabapple, magnolia and various specie…