I have trouble keeping miniature roses alive; but, I found a Valentine clearance basket with about 3 healthy looking roses in it. I looked today and the leaf tips on new growth are starting to look whitish.

If I read some of the other threads correctly, I should separate the plants, wash the leaves well and transplant them. They are going to need at least another month if not two indoors. I was hoping I would be able to keep them alive that long. -21C right now.

Does this seem like a reasonable approach? Will it get rid of the mold?