When does watermelon grow best in 24 solar terms?

Watermelon grows best in Grain Rain around the solar term in late April. The temperature at this time is about 20-22℃. After that, the temperature rose rapidly and the rainfall increased. Before and after Grain Rain, the temperature and humidity are suitable for watermelon seeds to germinate and emerge quickly. The optimum temperature for watermelon growth is 25-30℃, and the optimum temperature for root growth is about 30℃. Seeding watermelons before and after Grain Rain can produce whole seedlings and strong seedlings, laying a good foundation for high yield of watermelons.