I bought my tibouchina at an "end of summer"sale at the garden center. It was flowering and looking gorgeous when I brought it home. Now it is looking sickly and pathetic. I have tried to follow the instructions of the nurseryman, but I don't know what I'm doing wrong. Here are its growing conditions: My tree is indoors in a spacious living room; it gets full afternoon sun in a west facing window; I have been keeping the soil moist, and lightly fertilizing every week or so w/ Bloom Plus (10/54/10). The tips of the leaves are turning brown and curling up. There is new growth on top, but as soon as buds appear, they dry up and fall off. (When it first got here it lost a lot of its leaves, but I figured it was the shock of the moves, since new growth appeared afterwards.) Any advice you can provide to help me grow a healthy tibouchina would be greatly appreciated.