My lilac bush is getting eaten by something taking big bites out of the leaves. I can’t see any insect on the plants. What could
it be? Bush is 8 years old and small in size about 2 ft tall.
Certified GKH Gardening Expert
Without seeing some kind of sign, it can be hard to tell what is killing your plants. If you can include a photo, and how you normally care for the plant then I can better help you to find out what is causing this.
In the meantime, this collection of articles will give you ideas on how to craft your own pest control: https://www.gardeningknowhow.com/special/organic