I have 3 hibiscus plants in pots on my back deck. One of them has had yellow/dropping leaves for weeks. Now I see some yellow leaves on the other two. I don't see any bugs and I fertilize them once a week and water them every other day. What should I do to stop this leaf problem? Thanks.
The following article should be of some help to you: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/answers-to-what-causes-hibiscus-leaves-turning-yellow.htm