Best graft for root stock stump?
Hello, I was in a friend's yard and he was throwing away a pot that had a stump left in it. Upon further inspection, it looks like a trifoliata rootstock (a 2 foot tall, 3 leafed sprout was shooting out of the side of it and whatever was grafted on top was completely cut off except for about 1 inch. I'd like to cut off the top 1" and then graft onto the root stock. The root stock is about 1.5" in diameter.
What is the best method for this circumstance? Or is it a goner? The rootstock still looks alive whereas the remaining 1" graft/trunk above it looks dry/dead. Thanks!