Hi,
I have a standard lilac tree (a graft of a lilac plant). I have it for over 5 years and it has never been pruned. Now, 2 of the branches from the center of the graft is not producing leaves so I think it is because the branches are too heavy and the graft is damaged??? I am not sure. If I removed the 2 dead branches, it will deform the tree (because right now it is a perfect globe shape, except no leaves/flowers on those branches). What should I do?
Thx, Alex