在我国北方地区，不耐寒花卉入室后常常出现黄叶现象。造成此种情况的原因很多，但是从改善气象条件方面考虑，如果不是正常的叶片衰老，应注意以下几个方面即能预防。 1、控制浇水 入室后，由于空间不如室外开阔，花盆及植株表面的水分蒸腾量有所降低。如果此时还像原来那样 In northern China, the yellow leaves often appear after the cold-hardy flowers enter the room. There are many reasons for this situation, but from the aspect of improving meteorological conditions, if it is not the normal leaf senescence, should pay attention to the following aspects that can prevent. 1, control watering into the room, as the space is not as open as outdoor, flower pots and plant surface water transpiration decreased. If this time still like that