alex Keenan wrote:As far as I know the key is in the root stock used. We have fire blight in my area. I always order trees grafted on fireblight resistant rootstock.
So you may wish to get good root stock and just graft what you want onto it. grafting is not hard and you can find people who sell grafting woodstock. Check with north american fruit explorers.
...the key is in the root stock used.