Chris, The only place I can keep my Phals alive is in the house where I have a swamp cooler. Gets way too hot and dry in summer, and mostly cold and dry in winter. I can heat the greenhouse, but I can't cool it. I have tried both types of pots, and prefer the clay for two reasons; first the plastic ones degrade and start crumbling, and second the weight of the clay pots keep them from tipping over when the plant starts climbing over the side.
