A plant that requires a long period of darkness, is termed a "short day" (long night) plant. Short-day plants form flowers only when day length is less than about 12 hours. ... If these are exposed to more than 12 hours of light per day, bloom formation does not occur. Other plants require only a short night to flower.
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A plant that requires a long period of darkness, is termed a "short day" (long night) plant. Short-day plants form flowers only when day length is less than about 12 hours. ... If these are exposed to more than 12 hours of light per day, bloom formation does not occur. Other plants require only a short night to flower.