In order to control the flowering of tomato seedlings, try to use safe regulators, such as taking 30 ml more. (If 3 ml water 15 kg is sprayed on the leaves) it may increase the length. Generally speaking, if the seedling height is reasonable, the stem is thick and not hollow, the leaves are thick and small, and the leaves are dark green, such seedlings generally belong to normal seedlings, which not only do not need to be controlled, but also often have good flower bud differentiation, high fruit setting rate, large fruit size and good quality, and it is easier to obtain high yield.

When producing tomato seedlings in summer and autumn, due to the high temperature and small temperature difference between day and night, it is easy to promote the slender phenomenon of tomato seedlings, and it is often impossible to control the overgrowth of tomato seedlings through water and fertilizer regulation. At this time, chemical control with dwarfing effect can give priority to stronger varieties. Microbial agents and seaweed extracts can be applied to adjust the overall growth of crops, and potassium dihydrogen phosphate or seaweed extracts can also be sprayed to control the growth.

Just lower the temperature at night. Pesticides have side effects, especially pleiotropic effects. Many novices can't master the dosage, which is easy to cause phytotoxicity and bring irreparable economic losses to farmers. There are many safe and controlled drugs on the market now. If the tomato grows too vigorously at seedling stage, spray Zhuang Zhusu according to the growth situation. If tomatoes are planted in greenhouses, the ventilation should be appropriately increased while the medicine is mixed, and attention should be paid to the night according to the temperature.

If the expectation of tomato seedlings is too high, you can spray chlormequat chloride+potassium dihydrogen phosphate on the leaves to control plant growth and coordinate nutrient supply, and be careful not to overdo it. Using a pesticide to control the overgrowth of tomato seedlings may be paclobutrazol. The leaves are thick, small and dark green, so this kind of seedlings generally belong to the seedlings with normal growth momentum, which not only does not need to be adjusted, but also often differentiates flower buds in the later stage, with high threshing rate, large fruit, good quality and easy yield.