Why do mustard greens turn yellow?

* Nutrient deficiency: Mustard greens need a variety of nutrients to thrive, including nitrogen, phosphorus, and potassium. If the soil is deficient in any of these nutrients, the leaves may turn yellow.

* Drought: Mustard greens need regular watering to stay healthy. If the soil is too dry, the leaves may wilt and turn yellow.

* Heat: Mustard greens are cool-season plants that prefer temperatures between 60 and 70 degrees Fahrenheit. If the weather is too hot, the leaves may turn yellow.

* Disease: Mustard greens can be susceptible to a variety of diseases, including downy mildew, powdery mildew, and white rust. These diseases can cause the leaves to turn yellow, wilt, and die.

* Insects: Mustard greens can be attacked by a variety of insects, including aphids, flea beetles, and cabbage worms. These insects can damage the leaves, causing them to turn yellow.

If you notice that your mustard greens are turning yellow, it's important to identify the cause so that you can take steps to correct it.