Q.Hibiscus Leaf Yellowing
I live in Atlanta, which I believe is Zone 7. Every summer I have a double hibiscus in a container on my patio. As usual, the plant has been beautiful until a few days ago. All of a sudden the leaves in one area began to turn yellow and drop off. I closely inspected the plant and find no webs or bugs on the underside of leaves. However, I did find some tiny red bugs (like mites visable to the naked eye) crawling on the stems and branches where the leaves are yellowing. Do you know what these are and how they can be treated?

Certified GKH Gardening Expert
Sounds like red spider mites. This article should help: https://www.gardeningknowhow.com/plant-problems/pests/insects/red-spider-mites.htm