I'm seriously thinking about planting a willow tree on the east side of my garden to provide a bit of shade in a VERY sunny area. It's also a sub-irrigated area, and someone suggested that a willow tree would do well there. Unfortunately, none of our local nurseries have any willow trees now, and with the price of gas, I'm thinking it might be worth it to just have one shipped to me. I understand they grow fast, so I was thinking of starting out with a smaller one, and also thinking that a smaller one would adapt more quickly than a big tree. Any suggestions?