Watermelon red sweet potato is a new sweet potato variety in China, which requires extremely high temperature change. The optimum growth temperature is about 22 ~ 30℃, and the growth stops when it is lower than 12℃. Watermelon red sweet potato is a typical short-day plant, and the suitable illumination time is 8 ~ 10 hour per day, which can promote flowering and increase fruit yield. Fertilization of watermelon and red sweet potato is mainly based on NPK compound fertilizer.

Growth habit of watermelon and red sweet potato

Watermelon and red sweet potato should be given sufficient sunshine environment from the stem and leaf stage, otherwise the photosynthetic efficiency and yield will be reduced.

Watermelon and red sweet potato have strong adaptability, and the humidity in bud stage, seedling stage and stem and leaf stage should be kept at about 80%, so it is not advisable to water too much, otherwise the root system will grow slowly, so it is necessary to strengthen management and pay attention to drainage in rainy days.

Proper application of nitrogen fertilizer can promote the growth of stems and branches of watermelon and red sweet potato and promote photosynthesis, but excessive application of phosphorus fertilizer is not suitable, which can be beneficial to root absorption and improve fruit quality.