As we all know, watermelon is a crop that can't tolerate continuous cropping. After many years of planting, there will be many soil-borne diseases, a lot of dead seedlings, rotten trees, or some bacterial wilt. Many large-scale farmers often change planting sites or use microbial agents to alleviate the problem of continuous cropping.
For friends who grow up in vegetable gardens or balconies, you can cultivate watermelons without soil. Using flowerpot or substrate bag to place the prepared substrate can not only solve the problem of continuous cropping, reduce the occurrence of diseases, but also be beneficial to the growth of watermelon. Moreover, how much water and fertilizer is needed to plant a tree in planting bags can be calculated and fixed, which can achieve the purpose of saving water and fertilizer, which is very convenient and suitable for balcony planting.
Planting watermelon
Some friends will encounter watermelons that don't bear melons, even if they do, they won't grow up, and finally they won't be able to eat melons. Whether watermelon seedlings can grow or not is related to the soil, and whether they can bear melons has a lot to do with water and fertilizer management and branch management. After the watermelon bears fruit, it needs more fertilizer and water. After sitting on the melon, we should pay attention to the use of potassium fertilizer. Nitrogen fertilizer cannot be applied alone, and potassium sulfate can be applied topdressing or high potassium compound fertilizer.
Potassium chloride is not recommended when topdressing potassium fertilizer, because watermelon is sensitive to chloride ion, which will reduce the sugar content and quality of watermelon. It is best to use potassium sulfate. At the same time, combined with spraying potassium dihydrogen phosphate on the leaves to improve the taste of watermelon, watermelon should be properly controlled in seedling stage, but it needs more water after fruiting, so it should be watered frequently and not too dry.