There are other types of tibouchina that I don't think are quite as demanding, perhaps? At least mine wasn't, until I killed it by moving it in hot weather. Here's a photo of the one I had, peeking out from behind my rudbeckia triloba, though I don't know which one it is. It was really pretty. Bloomed well for me in a large container for a long time before going into the ground. Then it bloomed well there, until the fatal shovel came along! I don't suppose anyone can tell which one it was from this poor photo? Marcia

Spectaluar tree. There is also a double flower one, peony like, which is rarely mentioned. Please take note.

At this time of year, perfectly normal. Probably the worst time of year you could select for tree planting. Your tree has transplant shock. Just keep it properly watered and you should be OK, providing the rootball itself was thoroughly hydrated before planting. If not, I'd dig, rehydrate properly, then replant. If your current weather is warm and dry, I'd bump up that watering frequency to at least 2 times a week, soaking the planting area thoroughly and deeply each time. Next time, do NOT plant trees in August, do NOT amend the planting hole (whatever soil comes out goes back in without additions) and do NOT add bonemeal or any other fertilizer at planting time. Nurseries often give out very poor and outdated planting advice.

Habit and foliage looks different from that. As far as can be made out. This is going to continue to be like the blind men and the elephant unless and until better views are posted.