Understock has been growing alongside trunk for a long time, wondering if I need to seal cut with something, I seem to remember that there is something inexpensive that can be used,
27 October 2013 06:54 AM
The part that has grown from beneath the graft is something you don't want. If it has been there for a number of years, it is a good think that it hasn't taken over. Citrus trees are grated onto a very strong root stock (the rough lemon or citrus trifoliata) so you don't want to encourage it to grow back again as it will take over from that part of the tree called the scion that produces the edible fruit that you want to encourage to grow. When you cut the branch back to the trunk, if it shows signs of shooting again, rub off the new foliage that appears and continue to rub it off until it show signs of not re-appearing.