The young melons begin to swell after the female flowers of pumpkins die, and sufficient nutrient supply is needed. Fertilizers must be applied in time to ensure nutrient supply and promote the swelling of young melons so that the melons are big and full without deformity.

Fertilization method: fertilize the pumpkin female flowers 7-10 days after the flowers die and one month after the flowers die, with nitrogen, phosphorus and potassium as the main fertilizer, and potassium fertilizer. Apply 150-200 grams of nitrogen, phosphorus, potassium (15-15-15) or pure sulfur-based compound fertilizer and 80-100 grams of potassium sulfate per plant. After mixing the fertilizer thoroughly, evenly spread it on the soil 40-50 cm away from the roots of the pumpkin plant, and then cultivate a layer of soil with a thickness of 6-10 cm to cover the fertilizer.

In addition, 0.2%～0.3% potassium dihydrogen phosphate, 600～800 times amino acid active liquid fertilizer mixture, or 800～1000 times Xingpeng Phosphorus Potassium No. 1 and 800～1000 times humus should be sprayed every 7～10 days. The acid active liquid fertilizer mixture is sprayed continuously for 2 to 3 times. Spray evenly wet all the leaves, it is advisable to start dripping with water droplets, and supplement the nutrient elements from the leaf surface, which is conducive to the expansion and maturity of young melon.

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