Lilac Flowers Turning Brown. Spray copper sulfate during the early spring. Note the cupping of the leaves.
You must deadhead the lilacs soon after they finish blooming so. I know there was a lot of standing water near them for some time but apparently they were not actually standing in water. At times however the cause of death might be a bigger issue involving disease or pest infestation.
Maybe the timing was uncanny but about two weeks later the south lilac began to curl and brown and finally the entire plant was dead in about 6 weeks.
You must deadhead the lilacs soon after they finish blooming so. When you see wilting occurring on your lilac bush it is an indication that either its environment or disease is affecting the. If applied during times of high heat and humidity broadleaf weed treatments on lawns can volatilize turning to a gas and drift onto non-targeted plants. Blossoms can also be affected turning brown and limp.