问:梅花、桃花等一些花木为什么先开花后长叶?无锡方宏彬答:大多数花木都是先长叶,后开花。但有些花木,如梅花、玉兰、杏花、迎春、连翘、紫荆等.都是先开花后长叶。这是因为上述花木的芽都是在头一年夏季形成的,通过暑夏、秋凉和越冬休眠,完成了花芽分化,因而翌年春天即可开放。而这些花木花芽开放要求的气温往往要比时芽萌发的气温低,因此春寒未尽,它们就破绽怒放,以后气温逐渐上升,叶子才开 Q: plum, peach and some other flowers why the first long after the flowering? Wuxi Fang Hongbin A: Most flowers are the first leaf, after flowering. But some flowers, such as plum, magnolia, apricot, spring, forsythia, Bauhinia, etc. are the first flowering after the long leaves. This is because the buds of these flowers and trees were formed in the first year of summer. Through the summer, autumn and winter dormancy, flower bud differentiation was completed and the following spring opened. The flower buds require the opening temperature of the flowers tend to germinate when the temperature is lower than the bud, so the spring is not yet done, they burst into flaws, the temperature gradually increased after the leaves opened