为什么春兰有花蕾而不开花?
春兰在原产地不论是野生的或栽培的,很少有孕蕾而不开花的现象,但在北方或华南地区栽培,往往出现秋季孕蕾正常,到春天却开不了花,花蕾枯死或花梗不出土,以及在土面开花的不正常现象。实验证明,主要是春兰形成花芽以后,至开花前这段时间需要有一个冷凉环境,花梗才能伸长、开花。
北方栽培兰花冬季在室内越冬。有些人怕兰花受冻,放在较温暖的屋里,结果事与愿违。冬季温暖的环境对春兰花蕾的发育不利,春季开花反而受到影响。
生长正常的春兰,冬季应放在温度为O。C左右的环境中,并在有阳光的房间内养护1~2个月。这样,秋季形成的花蕾能够在低温下逐渐生长发育,当春天到来时,便能长出正常的花枝来。
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