The bracts of orchids are black, dry and shedding, and cannot blossom.

Four season orchid, Xia Han orchid and so on from bud unearthed to flowering, the time is not long, short 20 days, long 30 days. The management during this period is very important. But it is in the vegetative growth period and reproductive growth period to pay attention to fertilizer and water, light management! The bud blackens, scorches and falls off and dies for many reasons, mostly because it is too wet, too fat, stuffy and not ventilated, and the precursor of stem rot. It could also be caused by insect bites! Generally, flower buds show adequate nutrition, there is no need to continue to fertilize, as long as foliar topdressing on the line. It is necessary to control water and fertilizer before flowering, and see more sunlight appropriately. When arranging the bell of the bud, pay attention to buckle the water for 1 / 2 times. Spring Huilan has a period of bud pregnancy after the bud is unearthed. The Beginning of Autumn should strengthen the topdressing of phosphorus and potash fertilizer before the Winter Solstice. Cause the bud to expand by a long way. No matter fertilizing or spraying thin fertilizer, the interval should be controlled for 10 days. During the vegetative growth period of new seedlings, multi-element fertilizers based on nitrogen fertilizer should be used to promote strong growth and achieve the purpose of disease resistance and drought resistance. Therefore, the bud can not blossom normally, which is closely related to the early management.