Peter K. wrote:
I've got clay but not the standing water issues due to good surface drainage. For the clay you need to dig a hole much larger than you would normally and add organic matter and sand if you have it to make it easier for the three roots to grow and become established. If I had drainage issues I would raise the area I was planting the tree by making a mound (if necessary haul in soil) this year and planting a ground cover to prevent it from washing down and then next year plant the tree. A raised bed will serve the same purpous but personally I prefer the look of a mound as it is more natural than a formal bed. That said I have never faced both clay and drainage issues together.