What to do about uneven color change in tomatoes? Causes and solutions

Tomato, also known as the tomato, is a common vegetable in our daily lives. When unripe, its skin is green, and it gradually turns red as it grows. However, some tomatoes are half green and half red when ripe. What causes this uneven color? Below, Qinongwang brings you the causes and solutions for uneven color change in tomatoes.

1. Variety

There are many tomato varieties, and each variety has different adaptability to the environment and different quality, so they present different external appearances under different environments. Therefore, when choosing varieties to plant, you should consider the planting environment and select excellent varieties suitable for the local area.

2. Temperature

Tomatoes change color because of lycopene, but temperatures that are too high or too low will inhibit the production of lycopene, leading to uneven color change in tomatoes and the formation of irregular yellow-green spots on the fruit surface. This situation mainly occurs in early summer, when the temperature difference between day and night is large, and tomatoes cannot adapt to the sudden temperature changes, resulting in uneven color. Therefore, pay attention to temperature changes when planting. If growing in a greenhouse, the daytime temperature must not be higher than 30 degrees, and at night the temperature should be controlled at around 15 degrees.

3. Improper fertilization

When nitrogen fertilizer is applied excessively, tomato plants grow vigorously with dense leaves, which causes the leaves to compete for nutrients, leading to a rapid increase in chlorophyll and thus inhibiting the formation of lycopene. Secondly, during the color-changing period, the demand for phosphorus and potassium fertilizers increases. A lack of phosphorus and potassium fertilizers will lead to nutrient deficiency in the fruit and cause necrosis, and the plant's nutrient deficiency during the color-changing process results in less lycopene production, so a situation where green and red meet appears. For fertilization, we recommend mainly using organic fertilizer, with a balanced combination of various elements.

4. Light and water

Light and water affect the plant's photosynthesis and transpiration. If light is too weak, lycopene production is low and color change is poor; if light is too strong, direct sunlight will scorch the fruit and cause the fruit to change color. If watering is too little, the plant lacks water and grows poorly; if watering is too much, it will cause waterlogging and lead to root rot.

The above are the causes and solutions for uneven color change in tomatoes brought to you by Qinongwang. These are the main situations of poor color change in tomatoes. We hope this can help you.