A neighbour has just fallen into our magnolia, and split it about 4
foot up, where a main fork used to be. The right hand side came off
completely leaving a large split up the tree, however the left hand
side is still attached fully. As the tree is about 12 foot and
flowers lovely, is there anything i can do other than cut it below the
split ? there aren't any branches below the split which is about 12
inches long.