I have a phal that wouldn't grow or die no matter what I did, so I told it your on your own and moved it to a south window in sun room where the temps get down into the mid 50 to low 60s at night with day time temps in the low 80s, it now has 2 new leaves on it and is really looking better,I'll keep it there for the rest of the winter then it will go out side on the patio