My hibisus has lots of flowers but not very many leaves and they seem to yellow and fall off.
Hibiscus Leaves Yellow and Fall Off
Certified GKH Gardening Expert
This is common with these plants, and 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