杜鹃花不开花的原因：肥水过大或磷肥不足

植物图片 2019-07-24 20:25

杜鹃花，又名映山红，为常绿或平常绿灌木。相传，古有杜鹃鸟，日夜哀鸣而咯血，染红遍山的花朵，因而得名。最近有很多花友都跟小编说，她们家的杜鹃花养了好久都不见开花。她们百思不得其解，每天都好肥好水伺候，难道还不够？亲，想知道杜鹃不开花的原因吗？我们一起往下看！

杜鹃不开花

杜鹃花不开花的原因：

1、对于植物来说并不是好肥好水就可以让其达到最好状态。杜鹃不开花的第一个原因就是肥水过大，造成杜鹃只长叶子不开花，可以理解为营养过剩，出现新枝勃发却不开花的现象。

我们可以通过人为方法干扰其营养生长过盛，使生殖生长得到加强而促进开花。花前不施含氮的肥料，只增施磷、钾肥，调节体内磷氮比，避免营养生长过盛，促进花芽分化。剪去徒长枝及内膛枝，对发有四五个新芽的枝条，要搞除两三个，使树冠内部枝叶减少，阳光增多，碳水同化作用得到促进而使生殖生长增强。翌年春，控制浇水，做到盆土湿润，盆面偏干。深秋推迟人室越冬的时间，在没有浓霜或急剧降温的情况下，尽可能摆在室外，控制荫发新枝，有利开花。

杜鹃花花苞

2、花苞变叶子，杜鹃花的花苞形成时，先进行花芽分化阶段，在这一阶段必须增加以磷为主的肥料，不然花苞长出时，看起来像花苞，其实是叶芽。由于花苞被包藏在叶芽之内，当磷肥不足时，包藏在叶芽内的花苞就无法形成。因此待次年放叶时，见不到花苞，也就造成花苞变成叶子的误解。

杜鹃花

专题： 杜鹃花
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