Hi, I have a curry leaf plant that is thriving and is now 23" tall. I leave it out in a pot in the summer but bring it in the house once the weather changes, I daresay you could put it in a heated greenhouse but I wouldn't risk no heat. I initially brought it from someone online as a small plant, at the moment I have got scale insects on it which they give off a sticky substance on the leaves so have been spraying it with an organic pesticide (neem) and hope that this will do the trick. I would hate to lose it as find it invaluable to have in the kitchen but obviously wouldn't use it at the moment.