Keystone crab is aptly named after the great state of Pennsylvania! Given that it is the largest crabapple tree in Pennsylvania, and the largest crabapple tree in the United States!! A prolific annually bearing, disease resistant crabapple with an October to December drop time. Keystone crab is growing extremely vigorously in the nursery and the leaves look nearly flawless. Keystone Crabapple October to December drop in SE PA disease resistant vigorous annually heavy bearing Zone 4 hardy flavor profile is sweet, low acid, no tannin this is a grafted tree onto full standard seedling rootstock *This is a grafted tree on full standard seedling apple rootstock, chosen specifically to grow the tree as fast and large as possible. If there was a more vigorous rootstock out there, I would use it.
