Where are you located? I live in the piedmont of NC, and have a wildlife clearing in a creek bottom that floods in early spring. I have planted Mallus Fusca, southern crab, Dolgo and a few Antonokova rootstocks, all bare root. After about 4 years the pacific crabs are still alive, but have only grown about a foot and have problems with powdery mildew. The southern crab has done well on creekbanks, but is a CAR magnet. If you have cedars within half a mile you will have problems. The Dolgo is doing fine, but the best growth has been from the rootstock Antonokovas. They have survived one season of flooding, and in the first season the 18" whips grew to over 7' tall.