Something is eating around the edges of my calla lilies. Also, the leaves are turning yellow. Leaves look like they are being eaten around the edges and have started to turn yellow like it's dying.
Something Eating Calla Leaves
Certified GKH Gardening Expert
Yellowing leaves are generally a sign of watering issues. Either overwatering or not enough water.
Check the soil and adjust the moisture accordingly.
Have you inspected the plant for visible insects?
You could treat the plant with Neem Oil and is will take care of most insects that are common to the garden
Here are a couple of great links for you.