dead upper branches on lilac trees

Hello: Our four lilac trees were doing beautifully till this year. They are about 10 years old so well established. This year there is too little bloom and many upper branches are black and look dry and dead. Should i…

Lilac tree looking thin and blooms are sparse

We have a lilac tree that is getting thinner looking each year and has fewer blooms each year. As you can see in thd phito, the blooms are not full and there sre several branches with nothing on them. There…