Why Don't Watermelons Set Fruit? An Analysis of Cultivation Factors

(Nongye Zhifu Wang) The main cultivation factors that cause watermelons not to set fruit are as follows: First, improper variety selection. Some watermelon varieties produce female flowers late and sparsely, and are also prone to excessive vine growth. Second, overlapping and densely shaded leaves and vines result in poor ventilation and light penetration. This is caused by excessive planting density and failure to prune and remove side shoots in time. Third, improper fertilizer and water management, especially when the application rate of nitrogen fertilizer is too high and phosphorus and potassium fertilizers are insufficient, the plant's nutrition becomes imbalanced, the stems and leaves grow excessively, causing flower drop or fruit abortion and reducing the fruit-setting rate. Fourth, pest and disease damage, because pest and disease damage leads to poor development of female flowers or poor pollination, resulting in fruit abortion.