Greenhouse watermelon middle and late management One must re-apply to promote melon fertilizer: After sitting in melon timely fertilizer, apply NPK fertilizer per acre 10 kg; melon bowl mouth, and then chase NPK fertilizer 15 kg, potassium sulfate 5 kg. Second, to prevent drought and protect the melon: After the baby sits, continue to swell melon water 2-3 times, stop watering 5-7 days before harvest to promote sugar transformation. Third, to prevent premature aging of stems and leaves: After entering the expansion of the melon period, it is timely to use potassium dihydrogen phosphate for foliar spray, 5-7 days once, and even spray twice to prevent premature aging stems and leaves. Pen-Type Curing Light,Pen-Type Valo Curing Light,Pen-Type Led Curing Light,Pen-Type Light Curing Unit Rolence Enterprise Inc. , https://www.rolencedent.com