Types of foliar fertilizer for watermelon

In the middle and later stages of watermelon growth, due to the slow growth and gradual decline of root function, the ability of absorbing nutrients also tends to weaken. Foliar fertilizer is usually applied, and the types of foliar topdressing are mainly nitrogen, phosphorus and potassium. Generally, 0.3% to 0.5% urea solution, 0.4% to 0.5% potassium sulfate solution, 0.4% to 0.5% calcium superphosphate extraction solution or 0.3% potassium dihydrogen phosphate solution can be sprayed on the leaf.