rose of sharon

Question

I have two Rose of Sharon bushes [out of 15] that have total yellow leaves. It is fall here and unsure if to cut back or what. No signs of “bugs.” They started this about 3 months ago.

Thank you.

Answer 1

If there are no bugs on the plants, the most likely explanations for yellow leaves are excessive water or a lack of nutrients in the soil. See this article for advice:
https://www.gardeningknowhow.com/ornamental/shrubs/rose-of-sharon/yellowing-rose-sharon-leaves.htm