Q.cup-shaped leaves on lilac
My lilac tree has cup-like shaped leaves and I would like to know what it is. I planted this tree this past spring. I purchased 2 lilac trees and only 1 is having these leaf problems. There is nothing else on the leaves, such as mildew or spots. Can you help? Thank you.
I have heard of the variety Miss Kim is quite sensitive to water conditions.
Either to dry or soggy roots effect this variety and will have cupped leaves followed by leaf drop.
That being said, to dry or to wet could effect any plant with leaf cupping along with yellowing leaves.
Aphids are another possible cause. They can be so small you can't really see them. If you suspect insects treating with Neem Oil is a good and safe treatment.
It is safe for people, pets and bees.
Here are some links for you.