Kwanzan Flowering Cherry Tree: when to prune?
I have a Kwanzan Cherry Tree that is growing with a central leader straight up, very few short side branches, it's about 15' tall. I'd like to cut the central leader to encourage side branching and getting it more full. When is the correct time of year to prune a Kwanzan Flowering Cherry. The diameter of the trunk is only about 4" so it's a skinny tree.