喜冷凉怕炎热的宿根花卉,多以休眠的方式来适应南方的高温炎夏。休眠以后,有的品种仍保持绿色的叶片,如天竺葵、秋海棠、君子兰等,叫常绿休眠;有些花卉在休眠期叶片落光,如仙客来、风信子、水仙等,叫落叶休眠。所有这些花卉,它们在炎热的夏季,由于生长缓慢,新陈代谢极慢,便出现休眠或半休眠的状态。其主要原因是由于高温、干旱而引起叶片枯黄、落叶等现象。因此,在夏季的养护管理方面,必须针对这一生理特点,加以精心的护理,使它们安全度夏。具体要求做到:一、遮荫通风入夏后,将休眠的花卉,置于通风荫凉的场所,避免阳光直射,如气温高时,还要适时地向盆株周围及其地面喷水,以达到降低气温和增加湿度等防暑效果。二、控制浇水对夏眠的花卉,要严格控制浇水量。如浇水过多,盆土太湿, Hi cold afraid of hot perennial flowers, mostly to sleep in the South to adapt to the hot summer. After dormancy, some species still maintain the green leaves, such as geranium, begonia, clivia, etc., called the evergreen dormant; some flowers in the dormant leaves falling light, such as cyclamen, hyacinth, narcissus, etc., called leaves dormant. All these flowers, they are in the hot summer, due to slow growth, very slow metabolism, they appeared dormant or semi-dormant state. The main reason is due to high temperature, drought caused the leaves yellow, deciduous and so on. Therefore, in the summer of conservation and management, we must take care of this physiological characteristics and make them safe and secure. Specific requirements: First, shady ventilation into the summer, the dormant flowers, placed in ventilated shady places, to avoid direct sunlight, such as high temperatures, but also in a timely manner to the basin around and its surface water to To reduce the temperature and increase the sunstroke effect such as humidity. Second, control the watering on the hibernation flowers, we must strictly control the amount of watering. Such as excessive watering, basin soil is too wet,