Originally Posted by b54red

It is better to have scions ahead of the root stock because you only need the top of the plant and it doesn't matter how far you go up the scion to match the root stock stem size. It does matter if you have to cut the root stock off too low because then you have the problem of the join being too close to the soil line when planting out in the garden. I have use the top few inches of scions that were over a foot tall to graft onto my small root stock. I haven't seen any disadvantage other than if you let the scion get too old the stem becomes fairly thick near the top sometimes, making matching to the young root stock stem difficult.

Bill