MOST OF US have something to hide—in our gardens, that is, some view of something we’d like to erase. It could be the telephone pole across the street that we can see from certain spots, or the neighbor’s driveway, or even something within our own property—the trash bins or who knows what. Today’s guest, Basil Camu, has a suggestion: an inexpensive, quick-to-develop privacy screen started from a diverse mix of native saplings, sort of a hack of the concept of planting a pocket fores...