The daytime temperature of watermelon during flowering and pollination is generally kept at 25 ° C? 28 ° C, not too high. The temperature at night should be slightly higher than usual. Generally, the minimum temperature before dawn is above 15 ° C. At this stage, watering shall be controlled, and generally, watering is not allowed if the plant does not wither. Watermelon is a cross pollinated crop, and there are no pollinating insects in the greenhouse. Therefore, within 2 hours of female flowers opening, that is, about 8? At 10:00, artificial pollination is required. One male flower can give 2? 3 female flowers, 1 melon per vine. Knot
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