I'm getting ready to convert my 8'x8'x10' shed into a coop and build a net run on the side. I'm planning on bringing home some chicks in mid April or early march and I want to plant a tree next to the run this fall to give them shade during the day when they are not free ranging. What are some good trees that I could plant that would grow at a normal or faster rate to shade the chickens? I live in zone 6 and the tree would get full sun 8+ hours. Also something I worry about is I do have a septic tank and my leach field ends about 20 feet away from the coop. So I need a tree that does not have aggressive rooting systems that could possibly clog or damage my leach lines. I don't want a $25,000 tree.