Outside of Taiwan, generally speaking, in places where the average temperature lies around 10 ℃, you should put your bulb in the water 40 days in advance of the time you want it to blossom. If the temperature is around 15 ℃, schedule it 30 days in advance. If the temperature is 20 ℃, 20 days will do.
如果在台灣以外，一般說來，平均氣溫在攝氏十度的地方，應該在預計開花日前四十天下水，十五度三十天，二十度則二十五天即可。