In my garden, hibiscus plants are there but one week back one plant died all of a sudden then one more plant like this. All plants are sick. Their leaves are falling. What to do I don't know.
Certified GKH Gardening Expert
It could be a pest or fungal problem and neem oil can help with this. Here is more information: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/answers-to-what-causes-hibiscus-leaves-turning-yellow.htm, https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm