扶桑为锦葵科常绿花卉,具有不断开花的习性,扦插苗当年即可开花。扶桑若三、四年后都不开花,主要有以下原因:1.光照不足扶桑为强阳性植物,只有在光照充足的条件下才能花开不断,有些人长期在室内陈设,由于光照不足,致使枝条徒长而不开花。2.氮肥过多施肥过多过勤,尤其是氮肥过多,导致枝叶徒长,不能孕蕾,即使有少量花蕾,也往往会因缺乏磷钾元素而败落。3.修剪过重扶桑是由顶芽分化为花芽 Hibiscus as malvaceae evergreen flowers, has the habit of continuous flowering, cutting seedlings that year can flowering. Fuso if three or four years after flowering, mainly for the following reasons: 1. Lack of light strong hibiscus positive plants, only in sufficient light conditions to bloom constantly, some people long-term furnishings in the room, due to lack of light, resulting in Branches are long and not flowering. 2. Too much nitrogen fertilizer Too often over-ground, especially excessive nitrogen, leading to foliage so long, can not bud, even with a small amount of buds, often due to the lack of phosphorus and potassium elements and decline. 3 pruning is excessive from the top buds into flower buds