1. Lotus roots mature in October in autumn.

2. It takes 50-90 days from the emergence of the rear leaves to the full expansion of the new lotus roots. The appearance of the last leaves indicates that the apex of the underground stem has begun to extend from horizontal to diagonally downward, and the internodes shorten and expand section by section, accumulating nutrients and forming new lotus roots. It takes about 30 days for each lotus root to swell from the beginning until the whole lotus root is fully enlarged and finalized.

3. However, at this time, the water content in the new lotus root is high, and the dry matter content such as starch and protein is small. It usually takes about 30 days to gradually reduce the water content and increase the dry matter content in the new lotus root. , finally reaches internal enrichment and enters dormancy for the winter. The above-ground leaves also gradually turn yellow and all die after frost.