I have mainly house plants, such as devil's ivy , peace lillies, a zephritis, angel wings, and creeping phlochs. I have put them outside on my deck and surrounded them in tarps with 2 heat lamps and a heater. I keep them watered regularly by checking their soil. Where I live , there has been some cold nights , down in the 20's at which time, I run the little heater only for those times. The heat lamps stay on 24/7. They are not exposed to high winter wind, the tarps shield them from those type of conditions. I have recently seen that they have wilted very severely, best description, the leaves and vines are paperlike. I do not know if they are dead or damaged.I need to know what to do to save them. Do I trim them back and let them start new if they can , or have I lost them.