一般来讲,兰花在盆中生长一二年,兰苗发展多了,根系就有点拥挤,植料中的养分也已耗尽,这时就需要分株和换盆了。笔者养建兰较多,经多年比较和实践,觉得秋季换盆最佳。在太原地区,笔者多在10～11月换盆。建兰在华北以北地区一般7～11月开花。只要环境适宜,全年均可不停地生长。在抽葶的同时,叶芽也蠢蠢欲动了,花后叶芽迅速萌动生长。气温在7～8℃时生长较为缓慢,稳定在10℃以上时新芽加快生长。一般在11月中下旬新芽破 In general, orchids grow in pots for a year or two, blue seedlings develop more, the root system is a bit crowded, and the nutrients in the plant material have also been exhausted. I raise more orchid, after years of comparison and practice, I think the best autumn basin. In Taiyuan, I often change the basin from October to November. Jianlan in north of north China generally 7 ~ November flowering. As long as the environment is suitable, you can grow all the year round. Pumping at the same time, Yeya also just around the corner, after the rapid growth of budding sprout buds. When the temperature is 7 ~ 8 ℃, the growth is slow. When the temperature is above 10 ℃, the sprout accelerates its growth. Usually broken in mid to late November