I want to turn the whole of my cold frame into a wicking water, like the ones shown here.
http://deepgreenpermaculture.com/diy-instructions/self-watering-tray/ This would be a big advantage, since things dry out fast here in Colorado, and I am very busy. I will be starting hundreds of plants for the Saint Isidore Society farm and for my home garden. The cool weather things will go in an unheated greenhouse.
However, I also need to start lots of tomatoes and peppers. I was planing to heat the frame with a heating cable under sand. Would this make water evaporate so fast as to make this watering system impossible?
