I've found white spots on the trunk of my hibiscus tree and on the leaves. My plant is losing leaves. I see a similar affliction killing my mother's croton. What can I do to save my plants?
Mold or Scale Treatments
Certified GKH Gardening Expert
It is likely scale or mealybugs. The treatment for both is the same. These articles will help: https://www.gardeningknowhow.com/plant-problems/pests/scale-bug-how-to-control-plant-scale.htm