Why are the leaves turning yellow and falling off my hibiscus plant?
The plant next to it is doing well.
Certified GKH Gardening Expert
This cultivar may consume nutrients faster than normal. They are already very heavy feeders, requiring consistent fertilization. This article will give you more information on these: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/how-to-care-for-hibiscus-plants.htm