About 2.5 years ago, I ordered some fruit trees (2 plum, 2 apple, peach and nectarine) from Stark Bros. Nursery. They looked like small broom handles at the time, but have really flourished and I got some peaches and nectarines last year. I pruned some back in Feb/March, but I noticed yesterday that they're still filling in toward the center, especially the plum trees. I mean they're growing like crazy. I'd like to thin them a little more, but didn't know if doing it now would cause more harm than good. Looking on-line I've found plenty of conflicting info, so I figured I'd ask ya'll for some opinions. Thanks!