Q.How to Treat Leaf Disease on Hibiscus
I have three twined-bark hibiscus plants. Two are doing excellant but one is losing leaves, turning yellow, and blooming about three times the rate of the other two. I would like to clean the few leaves of this sick plant but I’m not sure what home remedy to use like alcohol, dishwashing soap and water, etc. Can you help?

Certified GKH Gardening Expert
Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/answers-to-what-causes-hibiscus-leaves-turning-yellow.htm