What wrong with my plant?
1
Looks like powdery mildew… I’d use Vinegar Solution after wiping the leaves : Mix 2 to 3 tablespoons of any type of vinegar per gallon of water and spray the tops and bottoms of the leaves until soaked, there’s also other solutions you can try like neem oil, baking soda and dish soap solution etc…. Get it before it starts sharing the love! Good luck
