I have a few medlar trees i grafted this spring that i am planting out to their final positions this fall (or may be next spring). They are grafted to pear rootstock about 12" up off the ground, that's just where the scion/rootstock had their best size match. Normally I avoid planting above the root flare and ridicule others for "volcano mulching", but maybe this is a special case? Someone on this board recommended planting with the graft under ground so the scion can grow its own roots in case of long term graft incompatibility. I'd love to get some second opinions, I'd like to have long lived trees, but I only have one of each cultivar, so i don't want to take to many risks.