Pumpkin head is big and small, which is an uneven supply of nutrients. In the whole process of pumpkin fruit growth, the nutrient supply is unbalanced, the water content is large before and then small, or the temperature is high before and then low, which affects the nutrient supply of roots to fruits and causes deformed pumpkins. Therefore, when planting pumpkins, we must master the fertilizer and water needed by pumpkins to prevent them from growing abnormally.