Answer: I assume your periwinkle are in shade and you're not experiencing too much heat in Florida yet. I'm not familiar with Dynogen, but if it is a plant hormone or fertilizer, then it could be what's causing the abnormal growth. Take a look on the label and see what the ingredients are. Keep the plant's well watered and if Dynogen isn't a fertilizer, consider giving the plants a dose of organic fertilizer such as fish emulsion or seaweed to increase the green growth.
Q&A Library Searching Tips