Water chestnut likes warm and humid, not cold-resistant. It usually grows in shallow water. Water chestnut needs high temperature and long sunshine in the early growth stage, such as the optimum temperature for germination is 15-20℃ and the optimum temperature for tillering is 25-30℃. In the late growth stage, the illumination time should be shortened (preferably less than 65438)
Growth habit: the growth period of water chestnut is 140-200 days. Bulbs can overwinter in the soil. In the following spring, the terminal bud produces a short stem, and the base of the stem produces a slender fibrous root, which penetrates into the soil for about 20-30 cm, and produces a time-like stem (tubular stem) upward, and tillers continuously to form a mother plant. The lateral buds pull 3-5 stolons around, and when they reach 10- 15 cm, the terminal buds pull the leaflike stems to the ground.
The number of new tillers and secondary tillers can reach 30-40. After high temperature in summer, tillering stops (in late September in Hangzhou, China), and new bulbs are formed at the top of stolons in the later period. At the same time, under the condition of low temperature and short sunshine in autumn, the aboveground stems also stopped growing, the flower stems were pulled out from the ramet center, and the multi-flowered spikes formed at the top reached full bloom before and after the Millennium.