The flowering period of longevity flower is not so fixed as long as it is allowed. In our country, it is usually from December to the end of May to the beginning of June. This has something to do with the environment. It's possible that the flowering period in South China will be over by April, but in the cool places in the north and high altitude areas, the flowering period will be delayed a lot, but the relatively concentrated flowering period should be from December to may, and the longest can be June.
The flowering time of longevity flower is mainly affected by temperature. Generally, the temperature is above 24 ℃, which is mainly controlled by high temperature, and the flowering period can be effectively prolonged. The specific flowering time is related to the source time of local high temperature.