The planting season of Mesona is around Qingming Festival, since it needs sufficient water, but not too much of water.

The harvest time of Mesona is around the White Drew of 24 solar terms (about mid September). It needs to be picked before the flowering season otherwise its colloid will be reduced, and it will be less chewy.

Mesona originally grows in piedmont areas such as hill land or ravine among weeds. Mesona in middle and northern areas of Taiwan is mostly planted under fruit trees of orchard. Most of these are from cutting propagation. Mesona likes cool and wet environment, but cannot resist low temperature, so temperature control is very important to its seedling growing.

Also, Mesona likes wet climate, so farmers should watch for humiditymaintenance during breeding period to support its growth. If the environment is too wet or flooded, Mesona’s leaves will drop out, or the entire plant will get rotten. Therefore, it is very important to watch the water draining in farming fields during the typhoon period or heavy rain period between July and September.  

Wikipedia

https://zh.wikipedia.org/wiki/%E4%BB%99%E8%8D%89