1. To determine the type of nutrients according to the growth of tomatoes. Generally speaking, the plant growth is more vigorous in the early stage of fruiting, easy to grow, you should use less foliar nutrients to promote the growth of stems and leaves, you can choose dihydrogen phosphate, compound fertilizer, etc.. The plant growth potential starts to weaken during the fruiting period, so you should use more foliar nutrients that promote stem and leaf growth to promote seedlings and keep leaves, and you can choose urea, sugar, etc.
2. To determine the type of nutrients according to the weather conditions. Insufficient light and poor photosynthesis in the greenhouse on rainy days make the supply of sugar to tomatoes insufficient, at this time the effect of sugar spraying on the foliage is better.
3. Foliar timely spraying of calcium fertilizer. Tomato fruit growth needs more calcium, when the soil is not enough calcium supply, the fruit is prone to umbilical rot disease. Therefore, in the tomato fruiting period should be sprayed with calcium chloride, calcium superphosphate, calcium amino acids, calcium supplement to meet the needs of tomatoes for calcium.
