After a few years of trying to convince the wife that being a legal patient I could build a small greenhouse, she consented! What I did was convert an unused above ground pool into a great little grow area. I used PVC for a couple of years, but there were too many issues, so a couple of years ago, my nephew and I bought a pipe bender and proceeded to build a great greenhouse that will probably outlast this old farmer. The area is 23' long by 17' wide and arches to a height of 7 and 1/2 ft. tall. It is attached to my lower deck and is completely enclosed under lock and key and fenced in.