Q.hibiscus plant
All of the leaves of my new hibiscus plants turned yellow and fell off. Although I do see some new growth, it looks quite ugly. Why might this happen?

Certified GKH Gardening Expert
If it is newly planted, it might be transplant shock. This article will help with that:
https://www.gardeningknowhow.com/plant-problems/environmental/learn-how-to-avoid-and-repair-transplant-shock-in-plants.htm
Here are some other reasons that the leaves may be yellow:
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/answers-to-what-causes-hibiscus-leaves-turning-yellow.htm