Celery is a cold-tolerant vegetable, requiring relatively cool and humid environmental conditions, and does not grow well under high temperature and drought conditions. Celery has different requirements for temperature conditions at different growth and development stages. The optimal temperature during the germination period is 15-20°C. If it is lower than 15°C or higher than 25%, the germination time will be delayed and the germination rate will be reduced. Under moderate temperature conditions, germination can occur in 7 to 10 days. Celery has strong adaptability to temperature in the seedling stage and can tolerate low temperatures of -4 to -5°C. The optimal temperature for seedling growth is 15-23°C. Therefore, seedling transplanting is often used for cultivation. The period from planting to harvest is the period of vigorous vegetative growth of celery. The optimal temperature for growth during this period is 15-20°C. If the temperature exceeds 20°C, the growth will be poor, the quality will decline, and the disease will occur easily. Adult celery plants can withstand low temperatures of -7 to -10°C.