The plant is 2.2m high and during a move, the stem has split about 1/2 way along. It has not broken off completely. We have managed to keep it in one piece but it will not stand up on it's own. The plant is now being held up with the assistance of a stake. Will the stem be able to repair itself and continue to be able to carry water or will this have completely killed the plant? Is there anything we can do to help it repair?