昙花为什么不开花
昙花为什么不开花,昙花从扦插到开花有的二年,一般三年定能开花。如果养护不得法,四、五年才能开花。这是什么原因呢?通常有三种情况,施氮肥过多,造成植株徒长;过度荫蔽,影响花芽的分化和形成;在阳光下曝晒,使变态茎萎缩发黄。
昙花在一年中的生长发育是有阶段性的,从春天到7月、8月是它营养生长和生殖生长的最旺盛的季节,此时要为其创造良好的条件。
立夏过后,放到室外有遮阴的环境里,切忌阳光曝晒。阳台上养昙花,不要直接放在水泥板上,最好用木板或隔热物垫起来,顶上搭上凉棚。若无条件放到室外,也可放在室内通风见光处,随着温度的升高,逐步增加肥水的供应,但进入6月下旬至出现花蕾以前,要控制肥水,使土壤干燥些,可增加喷雾,保持较高的空气湿度,以促进花芽的形成。
当花蕾出现后,肥水供应要充足,并及时追施一次磷肥,促花大色艳。花开过后,它有一段短时间的休眠期,此时要控制浇水,停止施肥,保持盆土不过干为宜。立秋过后,植株继续生长,为植株复壮,应施一次腐熟的有机肥料。冬季休眠期间,保持盆土不干,放在有阳光的地方,室温不低于10℃便可安全越冬,以上就是昙花为什么不开花的原因。
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