Corn Plant Leaves Yellowing [How to Prevent]

Yellowing of corn plant leaves can be a common problem that many gardeners and farmers encounter. It’s important to understand the reasons behind this issue to ensure a healthy corn crop.

In this article, we will discuss the possible reasons for the yellowing of corn plant leaves, its impact on crop yield, and ways to prevent this problem.

Also, Read: Corn Plant Leaves Turning Brown [Reasons & Preventions]

Creme & Green Corn Plant - Dracaena - 6" Pot - Easy to Grow House Plant Indoor

Why do corn plant leaves turn yellow?

Nitrogen deficiency:

One of the most common reasons for the yellowing of corn plant leaves is the lack of nitrogen in the soil. Nitrogen is an essential nutrient for the growth and development of plants.

When there is a shortage of nitrogen in the soil, corn plant leaves turn yellow starting from the bottom and moving up the plant. In severe cases, the leaves may even turn brown and die.

Water Stress:

Corn plants require an adequate amount of water for healthy growth. When there is a lack of water, the plant will conserve water by reducing its growth rate, and the leaves will start to yellow.

Overwatering can also cause the yellowing of corn plant leaves as it results in waterlogged soil, which can lead to root rot.

Soil acidity:

Corn plants require a soil pH range of 6.0 to 7.5 for optimal growth. When the soil pH is below 6.0 or above 7.5, the plant will start to show signs of nutrient deficiency, including yellowing of leaves.

Soil testing can help identify the pH level of the soil, and corrective measures can be taken accordingly.

Disease and pests:

Various pests and diseases can cause the yellowing of corn plant leaves. For example, corn leaf aphids suck the sap from the leaves, causing them to turn yellow.

Similarly, fungal diseases like Gray Leaf Spot and Southern Rust can also cause the yellowing of corn plant leaves.

Mineral deficiency:

Yellowing of corn plant leaves can also be a sign of mineral deficiency. Potassium deficiency is common in sandy soils, and its symptoms are yellowing of leaf edges and leaf tips.

Magnesium deficiency is identified by the yellowing of leaves between the veins, while iron deficiency causes the entire leaf to turn yellow.

Check out: How to Save a Dying Corn Plant

Dracaena Fragrans - Live Houseplant - Corn Plant - Indoor Florist Quality Foliage Tree

What is the impact of yellowing of corn plant leaves on crop yield?

Yellowing of corn plant leaves can have a significant impact on crop yield. When a plant is nutrient deficient, it cannot photosynthesize effectively, resulting in stunted growth and reduced crop yield.

In severe cases, the plant may even die, resulting in a complete loss of the crop. Therefore, it’s essential to take corrective measures as soon as possible to prevent a decline in crop yield.

How to prevent yellowing of corn plant leaves?

Soil testing:

Soil testing is a critical step in preventing yellowing of corn plant leaves. It helps to identify the nutrient deficiencies in the soil and determine the corrective measures required.

Soil testing should be done before planting and after harvesting to ensure the soil has the required nutrients for optimal plant growth.


Fertilizers can be used to supply the necessary nutrients to the corn plants. Nitrogen is the most critical nutrient for corn plants, and fertilizers should be applied at the right time to ensure maximum absorption by the plant. Other nutrients like potassium and phosphorus can also be applied as needed.


Proper irrigation is essential for healthy corn plant growth. Corn plants require regular watering, especially during the growing season, to prevent water stress. However, overwatering should also be avoided as it can lead to waterlogged soil and root rot.

Pest and disease control:

Pest and disease control measures should be taken to prevent the yellowing of corn plant leaves. Regular scouting for pests and disease symptoms should be done, and appropriate measures should be taken to control their spread.

Corn Plant Leaves Yellowing
Corn Plant Leaves Yellowing

Furthermore, you may like some more gardening articles:


In conclusion, the yellowing of corn plant leaves can be caused by various factors including nutrient deficiencies, pests and diseases, overwatering, underwatering, and environmental stress.

It is important to identify the underlying cause of yellowing in order to provide appropriate treatment. Taking preventative measures such as proper watering, fertilization, and pest control can also help maintain the health of corn plants and prevent yellowing.