Last night was 6 degrees so I first put a sheet on the pumpkin then crumbled up paper to hold air then 10 old shirts. After that I built a hoop house over it and placed 3 4l jugs filled with warm water inside. In the hoop house the low was 11. And directly by the pumpkin probably warmer. Now outside it's 18 and the thermometer in the hoop house reads 24.4