防止一品红落叶一品红在生长期如通风不良、缺氮、受寒、盆土过干或过湿，都会引起叶片脱落。防止落叶不难，应做到四点：（一）一品红喜肥，生长期内主要需氮较多，氮肥不足，会使植株下部的叶片脱落。除上盆施用迟效性基肥外，在摘心后一个月内，每隔一周追施一次充分腐... Prevent poinsettia deciduous Poinsettia in the growing season, such as poor ventilation, nitrogen, cold, pentu too dry or too wet, will cause the leaves fall off. To prevent deciduous is not difficult, should be done four points: (a) Poinsettia like fat, nitrogen is more needed during the growing season, lack of nitrogen will make the lower part of the plant leaves off. In addition to the basil fertilizer applied late, in the first month after the topping, chase once every other week full rot ...