When I worked for Radcliffe Parks Dept. in 1969, one day the parks superintendent showed up with two young cherry trees, took us into the churchyard of the parish church and showed us where he wanted 'em planted. We duly removed two neat circles of turf, dug the holes out, loosened the subsoil, enriched the soil, planted and staked the trees and backfilled carefully. Lovely job done. That afternoon the super came round again, stood back looking at our handiwork, stroking his chin and frowning, and said "They're not quite right. Just dig them up and plant them again eighteen inches to the left, would you."