Full stem is covered like white powder like disease. How to cure this?
My Hibiscus Plant Got White Powder Like Disease
Certified GKH Gardening Expert
The powdery residue is from a fungal issue called powdery mildew. You can treat the plant with neem oil. Here is more information: https://www.gardeningknowhow.com/plant-problems/disease/get-the-cure-for-powdery-mildew.htm