Hi. I just stumbled onto this forum and saw your question. I have 5 curry leaf plants that started out as 3" "sticks", and are now 2-3 feet tall. I keep them in a west facing window all year. The first summer I took them outside, then brought them inside in the fall. This past summer I just left them inside. They seem to be doing very well, as all my Indian friends are amazed, and I always have curry leaves for my dal, sambar & kozambu!
Hope this helps.
E