Why Do Cilantro Leaves Turn White? Causes and Solutions

Cilantro is a common garnish in our daily life. It has a short growth cycle, can be marketed all year round, and is grown over a fairly wide area. When growing it, many people often encounter some abnormal phenomena, such as leaves turning yellow or white. What causes this? Let's take a look together.

1. Continuous Cropping

Cilantro cannot be grown in continuous cropping. If cilantro is planted in the same plot year after year, its root system becomes extremely thin and weak, and the roots are shallow, so the plants become short and spindly due to nutrient deficiency. Because the roots are weak at absorbing water and nutrients, while the plant's demand for nutrients increases as it grows, the leaves gradually turn yellow or white from lack of water or nutrients. The solution is to avoid continuous cropping and use rational crop rotation.

2. Excessive Temperature

Cilantro forms in a cool-loving environment, and the suitable growing temperature is around 18 degrees. Once the temperature of the growing environment exceeds 20 degrees, its growth becomes slow, and if the temperature exceeds 30 degrees, its growth is stunted, and in severe cases the leaves turn yellow or white. So when temperatures are high, the temperature must be well regulated and lowered to the range suitable for cilantro growth.

3. Improper Fertilization

To increase yields, many farmers usually apply base fertilizer when planting. But if the base fertilizer is an unfermented mixed fertilizer, it releases a large amount of heat as it decomposes, causing root burn, damaging the root system, and making the leaves turn yellow or white. For this phenomenon, care must be taken when fertilizing: farmyard manure must be composted and fermented before being applied to the field, and if it is a compound fertilizer, too much should not be applied at one time.

4. Pests

Cilantro also suffers from some diseases and pests during cultivation. For example, some pests can cause the leaves to turn white. Aphids or red spider mites gather on the cilantro leaves and constantly suck the leaf sap, and white spots appear on the sucked areas. In severe cases, the leaves become yellowed, photosynthesis is also affected, and the whole leaf gradually turns yellow and dries up. Once pests are found, they must be controlled promptly. Usually, foliar fertilizer or abamectin should be sprayed to increase the plant's disease resistance and reduce pest damage.

The above is an introduction to the causes and solutions for cilantro leaves turning white. We hope it helps you. For more related knowledge, please stay tuned to us.