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

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1 Comment To "what triggers the flowering of winter flowering heather?. is it lengthening nights or temp falling, or both?"

#1 Comment By GKH_Susan On 01/23/2020 @ 1:03 pm

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.

https://www.gardeningknowhow.com/ornamental/flowers/heather/heather-blooming-in-winter.htm ^[1]

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