1. Lotus roots are planted in March and April every year when the temperature reaches above 15℃.

2. temperature: lotus roots can germinate only when they are planted above 15℃, and the temperature is 2 ~ 3℃ and the water temperature is 21 ~ 25℃ in the vigorous growth period. The temperature is also high in the early stage of lotus root knot, and the temperature difference between day and night is large in the later stage. It is required to keep above 5℃ during dormancy, and it is easy to be frozen below 5℃.

3. Illumination: Lotus root is a light-loving plant, which is not tolerant to shade. During the growth period, it requires sufficient illumination, which is not strict with the length of sunlight. Adequate illumination in the early stage is beneficial to the growth of stems and leaves, while adequate illumination in the later stage is beneficial to flowering, fruiting and the enrichment of lotus roots.

4. Moisture: The water level of lotus root is 5-1cm in the budding growth stage, 3-5cm in the vigorous growth stage, and it should gradually become shallow with the flowering, fruiting and lotus-knot of the plant, and only the soil needs to be fully wet or kept shallow during dormancy and overwintering.

5. soil: loam and clay loam rich in organic matter are the most suitable for lotus root growth, and the content of organic matter should be at least above 1.5%, and the soil pH should be between 5.6 and 7.5, with 6.5 being the most suitable, which requires equal attention to nitrogen, phosphorus and potassium.