I purchased a 7' crimson maple at Lowe's and planted it in mid May. It came in a container. It leafed out fine before planting, while we were waiting for the landscapers to do the yard. Since shortly after planting, there has been almost zero new growth; no new leaves or shoots. I recently loosened the (clayish) soil farther out from the base and found that there apparently has been root growth.
The twigs are supple and the tree is definitely alive. It's been well watered.
It's been a very hot summer. Any ideas as to why this tree may not be growing?