Why Are My Starter Tomato Plants Turning Yellow?

Tomatoes are popularly grown in home gardens all around the world. The tiny seedlings are nurtured with great care by plant enthusiasts until they grow into healthy vegetables. However, sometimes, these plants can turn yellow and cause concern. In this article, we explore some reasons why your starter tomato plants may be turning yellow.

1. Overwatering

One of the most common reasons for yellowing tomato plants is overwatering. Overwatering leads to saturated roots which prevent the plant from absorbing nutrients efficiently. This results in yellow or wilted leaves, and ultimately, death of the plant.

2. Underwatering

On the other hand, lack of water supply could be another reason for yellowing of tomato plants. Tomatoes require consistent and consistent watering supply which allows them to access vital nutrients, and sustain their growth. If you watering is infrequent, the plant may show yellow color with dry, brittle leaves.

3. Nutrient Deficiency

Tomatoes require various types of nutrients to grow healthily. The most important nutrients are nitrogen, phosphorus and potassium. If your tomato plant is showing yellowing of leaves, it may be an indication of nutrient deficiencies. Nitrogen deficiency usually results in yellowing of older leaves of the tomato plant, whereas a deficiency of other nutrients could result in yellowing of younger leaves or even the entire plant.

4. Pests and diseases

Another leading cause of yellow tomato plants is pests and diseases. Various insects like aphids, whiteflies and spider mites could infect tomato plants, leading to yellowing of leaves. Diseases like verticillium wilt, fusarium wilt, or bacterial canker are known to cause yellow leaves and eventual death of the plant.

5. Incorrect pH levels

Tomatoes grow best in soil that has a pH range between 6.0 and 6.8. If the soil pH is below or above that range, tomato plants will start to show yellowing of leaves. You can adjust the pH level of the soil by adding sulfur to increase the pH, and lime to decrease the pH

Conclusion

In summary, yellowing of tomato plants is a common problem with a range of different possible causes. The reasons we have discussed include over/under watering, nutrient deficiency, pests and diseases, and incorrect soil pH levels. To ensure the healthy growth of your starter tomato plants, it is essential to be aware of these reasons and take appropriate measures to prevent them from happening.