my lilac shrub and dead branches
I have 6 lilac that are about 5' tall. I'm wondering why all of them have so many dead branches. I already saw this last year. I am not sure if I should cut it. But I also want to know the reason why those branches are dead.
Here is some info I recall.
It's located in south part of my property at the back. It gets sun from 9am until 6-7pm. It's 3 years old. It flowered the previous years and never missed.