What causes tomatoes not to grow

When growing tomatoes, you often run into all kinds of problems, but the one that gives growers the biggest headache is tomatoes not growing, with very small fruit. This directly affects economic value and returns. And apart from poor nutrition, it is hard to think of any other cause, so often after fertilizing there is nothing else to do. In fact, there are quite a few reasons why tomatoes do not grow, and it is not only insufficient nutrients. Let us take a look at the details right away.

1. Soil fertility

Loam holds fertilizer best, sandy loam is medium, but sandy soil loses fertilizer and water very easily, and in the end this leads to a lack of soil fertility. So for planting you can use loam soil or sandy loam soil, do not use sandy soil; if you do not have more land, you can improve the soil by adding humus soil and loam. Insufficient soil fertility will lead to no growth.

2. Improper fertilizing

During the color-turning stage of tomato fruit, low-nitrogen fertilizer and high-potassium fertilizer are mainly used. The chlorophyll contained in the fruit should decompose when the time comes, but it does not decompose because too much nitrogen fertilizer was used, so the chlorophyll does not break down and lycopene cannot form. Potassium deficiency also affects this; photosynthesis will decline, affecting color, metabolism is very slow, and color turning is affected. In this case it is best to use a high-potassium water-soluble fertilizer; the amount of potassium fertilizer used should be twice that of nitrogen fertilizer. You can also apply foliar fertilizer and spray potassium dihydrogen phosphate to supplement potassium.

3. Low temperature inside the greenhouse

If it is off-season greenhouse cultivation in winter, because the outside temperature is too low, it will affect the temperature inside. And you cannot ventilate and let air through often, the air is poor, and winter sunlight is not strong. After the fruit sets, it is not easy for it to grow, and growth is slow. For this, it is best to keep it above 25 degrees during the day and above 15 degrees at night, and electricity needs to be used to raise the temperature. When it is sunny, open the roof vents appropriately for ventilation.

4. Uneven growth

It may be an imbalance between vegetative growth and reproductive growth. For example, when the fruit is setting, the branches and leaves grow excessively and too vigorously, thus consuming too many nutrients, so the nutrients for fruiting are insufficient and cannot compete with the branches and leaves, which leads to very small fruit. In this case, you need to pinch the main vine, remove side branches, and prune some weak branches and branches without fruit. This way growth may be much better, and if too much fruit has set, some can be thinned appropriately.

After tomatoes set fruit, they do not grow bigger, grow slowly, and show no obvious growth, mostly because of poor nutrition, insufficient fertility, and improper fertilizing. There are also some special situations that affect them.