How Do the Plants Know when Spring Will Be?

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The days are getting longer, the temperatures are rising – spring is beginning to grow. Now, too, nature is waking up from its hibernation: the first tips of fresh greens are pushing out of the ground, the buds of many shrubs and trees are getting thicker and crocuses, snowdrops and daffodils seem only to be waiting to finally bloom. But where do they know when the right time has come for it? And why do some flowers bloom later than others? "The…