Use organic fertilizers, phosphorus-potassium fertilizers, nitrogen fertilizers and other fertilizers to grow watermelons. Watermelons will be big and sweet.

1. Organic fertilizers

Organic fertilizers are very helpful for soil health and crop quality. When growing watermelons, use organic fertilizers made from compost or rotted animal manure, which improve soil quality, increase microbial activity, and release the nutrients your plants need.

2. Phosphorus and potassium fertilizer

Phosphorus and potassium are two important elements necessary for plant growth. Phosphorus and potassium fertilizers can increase the sugar content and quality of watermelon fruits, and are also beneficial to plant growth and development.

3. Nitrogen fertilizer

Nitrogen is an element necessary for the growth of watermelon. It can promote plant growth and also increase fruit size. However, if too much nitrogen is used, the watermelons will grow too quickly but with poor quality. Therefore, nitrogen fertilizer needs to be used in moderation.

Causes of watermelon cracks

1. Variety reasons

Some varieties with thin skin, crisp texture, and small fruit are prone to cracking. Round melons are easier to crack than oval melons, and oval melons are easier to crack than long oval melons. Melons with thick and short stems of the same variety are more likely to crack than melons with slender stems.

2. Temperature reasons

When it is cloudy for a long time and then clears up, melons will crack because the temperature rises too fast and too high. That is, the fruit develops slowly when exposed to low temperature in the early stage of development, and then expands rapidly and causes Causes cracked melons. In greenhouse cultivation, when the temperature is low at night and the temperature is high during the day, or when cold wind enters during ventilation during the day, the peel will become hard and watering will easily cause the melons to crack.

3. Fertilizer and water factors

During the melon-bearing period, sudden flooding or continuous heavy rains after continuous drought will input a large amount of nutrients into the fruit, and the growth rate of the melon rind cannot keep up with the growth of the melon flesh. grow and burst. During the melon expansion period, a large amount of nitrogen fertilizer is applied, and the melon rind expands slowly, while the pulp expands rapidly, causing cracked melons. Plots lacking calcium and magnesium are also prone to cracking melons.