阳台盆栽扶桑应注意哪些问题
扶桑为常绿灌木。花朵大、花色多。花虽朝开暮落,但连绵不绝,从5月开到10月。在酷热夏季,枝繁叶茂,有开上百朵的,且若年前扦插,一年有花,管理又较粗放,实为夏季赏花的佳品。阳台气温干燥,光照较短,要保持盆栽扶桑连续开花不断,就要千方百计满足它喜阳、喜肥和喜湿润气候的习性,才能叶色浓绿,花开旺盛。其具体措施为:
(1)扶桑为强阳性树种,盆栽扶桑应置阳台日照长的地方,若有条件常搬动,使之充分接受阳光照射,促使形成花芽。若阳光不足,不仅难以形成花芽,且易落叶、落蕾。
(2)平日浇水,要看干湿情况而定,过干过湿,都会影响开花。盛夏早晚都要浇水,春秋下午浇透水。生长季节,叶片要经常喷水,四周环境也要常洒水,以满足它喜湿润气候的习性。
(3)每年都要换盆。用腐熟的骨粉等做基肥。开春长叶后,每2~3日施1次稀薄肥,以氮、磷为主,这样孕蕾充实,花大色艳。花前忌施浓肥,以免落蕾。
(4)11月份降霜前人室越冬,置向阳处保暖,人房前要逐渐减少浇水量以防冻,室温低于5℃,则有冻害,低于10℃就落叶,可套以塑料袋防寒。室温高于15℃,则影响休眠,使来年开花不旺。休眠期不能施肥,浇水要少,不干即可。4月份出房前,先进行修剪,选3~5枝粗壮主枝,于基部留2~3个芽短截,其余全部剪除,则长势旺,树形美。
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