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I know how it work (Photoperiodism) but i wonder why all plants can't start flower in spring? Is it connected with ecological niche?

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  • $\begingroup$ This is a really big question, related to niche, evolutionary history, life history, and coevolved species (pollinators, seed dispersers etc). Among many other things. $\endgroup$ – fileunderwater Feb 22 '17 at 19:53

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