Dogwood
Dogwoods, in my expierience, transplant best early Spring ( early April). Measure the stem caliper(dia.), for every inch of caliper about 12inches of root ball is nescessary.
Be careful to keep it solid, a broken rootball could spell bad news for the transplant success.
John,
ISA Certified Arborist, Illinois Certified Nurseryman
Garden Visions Nursery