What causes leaves on sunflowers to be eaten and what is the cure
The plants are about 3 feet tall and small holes have appeared in the leaves. There does not see to be any insects on the leaves.
Certified GKH Gardening Expert
There are actually a few pests that like to nibble on sunflowers. Neem oil is generally effective for most insect pests. Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/flowers/sunflower/sunflower-problems.htm