My wife is lobbying for a greenhouse. We had a pile of dirt that got leveled out behind the garage with just about the right space for a 10 x 10 greenhouse. Water is available there, and there is some drainage. I ran across some of the clear plastic sheets for light transmission at HD, but I'm wondering what else I need to put in there. I can also feed some power in there for a small heater. Open to anyone who can suggest ways to build it and make it really work. During summer, I will add shade cloth to cut down the heat and light so we don't wind up with pre-cooked veggies. Anyone have a plan? I'm likely to use redwood for the construction because things get wet and muddy in a greenhouse.