what triggers the flowering of winter flowering heather?. is it lengthening nights or temp falling, or both?
What are the triggers for this winter flowering strategy? A plant science question I know, but i'm curious to know -- do they flower because temperature drops to a certain temperature? I tend to think its probably shortening day length or longer nights. But does lower temperatures play a part? thanks Paul
Certified GKH Gardening Expert
According to our article on heather winter blooming triggers, it is the right variety and proper care, especially full sun and well-drained soil with an acid pH. They bloom at different times depending on your location.