I grow mine outside all year, when the temps at nite start hitting the 50's I cover the top of the arbor with clear plastic so they can't get rained on at nite, if it is going to be in the 40's I wrap the whole structure in plastic, and open in the am so they won't bake. If it's sunny and going to be in the 70's during the day I water them. My supplemental heating is christmas lights, very scientific, I find I lose more plants moving them inside to outside then letting them weather it outside. Hope this is helpful.