Hey SnowAngel...glad you stopped by. This one is a stumper, but I wonder what do the leaves look like? Are they healthy and full? Patrick

I am growing periwinkles in zone 7a and they have been doing wonderful. Lately, the blossoms have turned into a punny star shape and are no longer full. What could be causing this? I water about every other day and they are planted on the east in partial sun. I have put Miracle Grow on them twice since planted in May. The temperature has been ...