Annette, I don't think some cool weather hurts them much. The one pic I took of the fern it had attached itself to a rock! And that room was quite chilly! I think they LOVE moist conditions, so anytime you can mist it the better. Mine did so well in our hot humid summer, and it hung under a tree where my hose is attached to the hydrant. I would mist it even a couple of times a day and it just kept putting up fronds like crazy. They do need well draining hangers, to keep them from getting too soggy.