Some of my hibiscus leaves are turning yellow on otherwise healthy plant.
Some of My Hibiscus Leaves Are Turning Yellow
Certified GKH Gardening Expert
There are several reasons this can happen. This article explains many of them and will help you decide which is likely for your plant: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/answers-to-what-causes-hibiscus-leaves-turning-yellow.htm