DH and I picked up one of those little walk-in tent-type greenhouses, and it is very cool. So is the weather. Cool, I mean. We put a couple of jugs of hot water out there last night, and put heavy blankets over the top, and the plants seem okay. But now it looks like we're going to have freezing overnight temps over the next couple days. So, I was thinking: If we took the Smokey Joe Weber kettle, put some hot coals in there, and set it in the middle of the greenhouse, do you think it would a.) keep things above freezing in the greenhouse, and b.) not cook the plants? Thanks, Pony!