My Rose Mallow plant has been adorning my garden for 3 yrs now. We have been thru a few bug problems and survived. This summer, in Ontario, which has been very hot and humid, the leaves are turning yellow and dropping. Because of the extreme heat I water when plant starts to wilt or, every other night. This plant is my garden joy so I don’t want to kill it. Any suggestions?
Watering is key to the health and growth of you Rose Mallow.
I would increase the watering to keep your plant from wilting.
When the plant wilts, it's all ready stressed.