I'm basically going to do a version of Lasagna Gardening where you act like you're planting a raised bed....without the sides;>! It esp works well on clay where it ends up creating a number of moisture levels; well draining, moist and damp. For some reason this yr my orders are arriving easier here than they did when we lived in Florida. Nurseries in one case for more than a decade....
Cheers,
Pat