Poorly lilac tree
Help please. I have a purple lilac (small tree really rather than a shrub) in my garden which was here when we moved in over 10 years ago so don't really know which species it is. I have never needed to do anything to it - beautiful blooms and foliage. Last year the leaves were rather sparse but we had plenty of blooms so to help it along, after flowering I pruned it a little. I took out the dead wood and cut back all the suckers - it didn't occur to me that I needed to feed it. This year it is virtually bald - there are about 5 leaves on it. A handful of suckers are back and they are leafy! It has loads of buds but these have matured at about 1 inch long and are flowering. It looks very odd and clearly needs help. The branches seem to be alive. What can I do to revive it? It's probably about 12 foot tall. I think some of the suckers are now growing in my next door's garden - and are in bloom! The neighbours fruit tree (plum?) is planted very close to the lilac. My husband has also used feed and weed on the garden in past years although not this year. Any ideas as to what might be ailing it? We really don't have very green fingers - are there any idiot proof ideas to help my lovely tree? All help will be gratefully received!