How Do Plants Know When To Bloom?

A pink dahlia flower beginning to bloom

How do plants know when to grow and bloom? Why do they go dormant in winter and know just when to burst forth again in spring? These are interesting questions for anyone, but especially for gardeners. Researchers are still learning more about how plants flower and grow as science delves deeper into plant genetics and proteins. Why the Timing of Blooms Is Important Plants go dormant in cold weather as a matter of survival. They slow down growth, and many plants totally drop their leaves and stop photosynthesis and sugar production. They shut down to conserve energy and protect against cold weather. It’s a little like hibernation in some animals. The timing of flower production is also important, but less for survival of the individual plant than for the species. Flowers are how certain types of plants reproduce, and to reproduce successfully, they must time their blooming correctly. Plants have […]

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