I'm sure this topic has been brought up before, but is there a general explanation - and solution to - the problem of maples leafing out in spring (as mine are now), but not producing any new shoots? I have several that used to be decent growers, but now some of them don't seem to be getting any bigger, or growing new branches. I'm talking about 1 and 2 gallon sized maples. I have a hard time believing they are pot bound because many of these I repotted a season or 2 ago, and they are tiny in comparison to the pot. Even having been repotted, these same problem trees are not producing new shoots. Also, on some of these, they seem to leaf out fine, look nice, and hold through the season, but they just aren't getting any larger, overall. Any ideas???