Why Do Corn Plant Leaves Turn Brown?

Last Updated on November 30, 2021

Corn plant leaves turn brown because of a fungus called Fusarium verticillioides.
Fusarium verticilliodes causes corn ear rot.
This disease affects corn plants during their reproductive stage.
The fungus infects the kernels of corn causing them to dry out and become misshapen.
This image explains the symptoms of ear rot caused by Fusarium verticilloides.

Corn plants leaves will turn brown due to one of the eight reasons:

1 It could be because of the presence of insects. 2 It could be because the corn plant is not getting enough sunlight. 3 It could be because there is no fertilizer present in the soil. 4 It could be because it is growing in a shady place. 5 It could be because you are using poor quality seeds. 6 It could be because your soil is acidic. 7 It could be because too much nitrogen is being used. 8 It could be because weeds are competing with the corn plant.


Corn plants leaves will turn brown because of stress. Stress is a condition where the plant does not get enough water or nutrients. This leads to the leaves turning yellowish green.

Inconsistent Watering

Plants need consistent watering to survive. Plants that are watered irregularly will experience stress. Poor Nutrition Answer: Poor nutrition is another common cause of leaf discoloration. It happens when the plant doesn’t receive enough nitrogen, phosphorus, potassium, calcium, magnesium, iron, zinc, copper, manganese, boron, molybdenum, chlorine, sulfur, sodium, silica, and other minerals. Fungus Infection Answer: Fungal infection is caused by fungi such as Botrytis cinerea gray mold and Alternaria solani black spot. These diseases affect corn plants during flowering stage.

Type of Water Used

Water quality affects the health of plants. Use only clean, filtered tap water. Avoid using bottled water. Too Much Sunlight


Humidity is measured in terms of percentage of moisture content in air. It is represented by the symbol “%” followed by the numerical value. For instance, if humidity is 60%, it means that 60% of the air contains moisture. Temperature is measured in degrees Celsius °C or Fahrenheit F. In case of Celsius, the temperature is expressed in digits after the decimal point. For example, 20 °C = 68 F.


Light is electromagnetic radiation that travels in waves. Different wavelengths correspond to different colors. Visible light ranges from about 400 nm blue to 700 nm red. Infrared radiation is invisible to the human eye but can be detected using special equipment. Ultraviolet radiation is even shorter wavelength radiation than visible light, ranging from 100 nm violet to 200 nm ultraviolet A. X-rays are another type of electromagnetic radiation, but they are not visible to the naked eye. Radio waves are still longer wavelength radiation than x-rays.


Fertilizers are used to increase the yield of crops. It is usually applied to soil after planting seeds. In agriculture, fertilizers are classified into two types: organic and chemical. Organic fertilizer is produced from natural materials such as manure, compost, green waste, and other agricultural wastes. Chemical fertilizer is manufactured from chemicals. Both types of fertilizers are available in liquid form, granules, pellets, and tablets.


Pests are organisms that feed on plants and animals. Insects, rodents, birds, reptiles, amphibians, fish, and mollusks are examples of pests. Pest infestation can damage crops, livestock, and human health. Pesticides are chemicals that kill pests. Pesticide poisoning is a common problem among farmers. Pesticides are toxic to humans and wildlife. Pesticides are not only harmful to people but also to the environment.

Causes Leaves To Brown

Browning of leaves is caused by several factors such as drought stress, nutrient deficiency, disease, insect attack, and other environmental stresses. It is usually seen during dry season. In case of severe drought conditions, leaves turn brownish yellow and fall off. This happens because of lack of nutrients in soil. Nutrient deficiencies result in poor growth of plant. Lack of sunlight results in chlorosis yellowing of leaves. Chlorophyll content decreases leading to leaf discoloration.

When To Water Corn Plants

Corn plants need regular watering to maintain healthy growth. However, if you notice wilting or yellowing of corn leaves, you should immediately give it a good soaking. The roots of the corn plant absorb moisture from the soil and store it in the leaves. If the soil dries out, the leaves start to wilt. As soon as the soil gets moist again, the leaves recover.

Effects of Inconsistent Watering On Corn Plant

Watering is very important for growing corn plants. It helps the plant to get nutrients from the soil. In addition, it keeps the soil moist and prevents diseases. But, if you water the corn plants irregularly, it affects the growth of the plants. Irregular watering leads to poor root development and weak stems. This results in stunted growth of the corn plants.

Causes Leaves To Brown

Brown leaves are caused by several factors. One of the main reasons for brown leaves is lack of sunlight. Plants absorb sunlight during photosynthesis process. If the light intensity is low, the plants cannot perform photosynthesis properly. As a result, the chlorophyll content decreases and the color of the leaves turns yellowish green. Also, insufficient water supply is another major factor causing brown leaves. If the soil dries out, the roots lose moisture and become dry. Then, the plant cannot take up enough water from the soil. As a result, leaves turn brown.

4) Humidity

Humidity is very important for growing healthy plants. It helps to maintain the right balance between air and water. Too much humidity can lead to fungal growth. In addition, if the humidity level is too high, the leaves will start to curl. This is because the leaf cells swell and the cell walls contract. The swelling and contraction of the cell walls leads to the formation of wrinkles on the surface of the leaves. 5 Temperature Answer: High temperatures can damage the plant’s root system. The roots are the part of the plant that absorbs nutrients from the soil. If the temperature is too high, the roots will not function properly. Therefore, the plant cannot get enough nutrients.

Causes Leaves To Brown

Browning is caused when the chlorophyll in the leaves turns into tannins. Tannins are chemicals found in many fruits and vegetables. These chemicals give the fruit or vegetable a bitter taste. As the tannin content increases, the color becomes darker. 6 Water Answer: Plants absorb water through their roots. Roots are located near the bottom of the plant. When the roots are wet, the plant needs less water. However, when the roots are dry, the plant needs more water.

5) Temperature

Temperature affects how quickly plants grow. A higher temperature speeds up growth. 4 Light Answer: Sunlight is needed for photosynthesis. Photosynthesis is the process where plants take carbon dioxide from the air and release oxygen. This allows plants to live.

Causes Leaves To Brown

Browning is caused by oxidation. Oxidation is when electrons are removed from molecules. It happens naturally in fruits and vegetables. 5 Water Water is needed for plant life. Plants get water from the soil.

6) Light

Light is needed for photosynthesis. Photosynthesis is where plants take carbon dioxide and water and produce oxygen and carbohydrates. 7 Carbon Dioxide Carbon dioxide is needed for photosynthesis to happen.

ing Conditions Causes Leaves To Brown

Brown leaves are caused by chlorophyll breakdown. Chlorophyll is a green pigment found in plant cells. It absorbs light energy from sunlight and uses it to convert carbon dioxide into glucose sugar. This process releases oxygen as a waste product. 8 Water Water is needed for photosynthesis because it helps the plant absorb nutrients from soil.

7) Fertilizer

Fertilizers are chemicals used to enhance the growth of plants. These chemicals are absorbed by the roots of the plant and taken up by the plant’s cells where they are converted into organic compounds. 6 Light Light is required for photosynthesis. Photosynthesis is the process by which plants take in carbon dioxide and release oxygen. Plants cannot live without light. 5 Air Air is necessary for respiration. Respiration is the process by which organisms obtain energy from food. 4 Soil Soil provides the medium in which plants grow. Without soil, plants could not survive. 3 Temperature Temperature affects the rate of chemical reactions within the cell. Too cold slows down metabolism cellular activity. Too hot speeds up metabolism. 2 Carbon Dioxide Carbon dioxide is a gas produced by animals during respiration. Plants use carbon dioxide during photosynthesis. 1 Oxygen Oxygen is a gas produced by plants during respiration. Animals use oxygen during cellular respiration.

Causes Leaves To Brown

Browning is caused when chlorophyll breaks down due to exposure to sunlight. This results in the leaves turning yellowish green. It is important to note that the color does not affect the taste of the fruit.

8) Pests

Pests are animals that feed off plants and other living organisms. These pests eat away at the plant’s roots, stems, leaves, flowers, fruits, seeds, bulbs, tubers, and even bark. 9 Diseases Answer: Diseases are illnesses that attack the plant’s body causing damage to the plant itself. Most diseases are spread from person to person, but some are transmitted by insects, weather conditions, and animal vectors.

Causes Leaves To Brown

Browning is caused by oxidation of chlorophyll pigments in the leaf tissue. This process occurs naturally during senescence aging, but it can also occur if the plant is exposed to excessive light levels, especially ultraviolet radiation. 10 Insects Answer: Insects are arthropods that have jointed legs and antennae. Insects are divided into two groups: holometabolous and hemimetabolous. Holometabolous insects undergo complete metamorphosis while hemimetabolous insects go through incomplete metamorphosis.

Spider Mites

Spider mites are tiny 0.2mm arachnids that feed on the leaves of plants. They suck sap from the plant and inject saliva containing digestive enzymes into the plant cells. These enzymes digest the cell contents and release nutrients back into the spider mite’s body. Mealybugs Answer: Mealybug infestations are common in greenhouses because these pests thrive in warm temperatures. They are usually found on the underside of leaves and stems. Their feeding habits damage the plant by sucking the juices from the leaves.


Mealybugs are very common in greenhouses. They are usually found under the leaves and stems of plants. Their feeding habits damage plants by sucking the juices from leaves.


Thrips are tiny insects that feed on plant sap. They are about 1/16 inch long and are blackish in color. They are most active during warm weather and are attracted to lights. They can be seen flying around lights and windows. Caterpillars

What does Overwatered corn look like?

Corn that is overwatered will become soft and mushy. Corn that is overwatered will not grow well and will produce fewer ears. In addition, overwatered corn will not store well.

Should you cut off Brown parts of leaves?

Overwatered corn looks similar to regular corn but it is usually smaller and thinner. It is not uncommon for hydroponic growers to overwater their plants because they are concerned about pests. This leads to problems such as stunted growth, poor quality, and even death. How do you prevent overwatering? Answer: To avoid overwatering, you should check the level of the solution every day. If the solution gets low, you should top off the reservoir. A good rule of thumb is to fill the reservoir until the solution reaches the bottom of the reservoir.

How do I make my plant leaves greener?

Hydroponics is a method of growing crops using nutrient solutions instead of soil. Hydroponic systems use a reservoir to hold the solution and a pump to move the solution around the plants. Plants absorb nutrients directly from the solution via their root systems.

How do I keep the leaves from turning brown on my plants?

You can prevent browning of the leaves by keeping the soil moist. It is important to keep the soil moist because if the soil dries out, the roots cannot get enough moisture and the plant will wilt. To avoid browning, you can spray the leaves with water every day. What is the difference between a hydroponic system and a soil based garden?

How do you fix Overwatered corn?

Brown parts of leaves are called “veins”. Veins are part of the leaf structure. They carry nutrients and water to other parts of the plant. Cutting off these veins reduces the ability of the plant to absorb water and nutrients. This could lead to wilting and death of the plant.

What does an overwatered corn plant look like?

Plants need sunlight to photosynthesize. Plants get energy from light. In order to get the maximum amount of energy from the sun, plants need to face towards the sun. If the sun is not directly above the plant, the plant will not receive as much light. To help your plant get the maximum amount of light, try placing it near windows or under a lamp.

What happens if you overwater corn?

Overwatered corn plants are usually stunted and yellowish in color. Corn plants that are watered frequently tend to produce smaller ears of corn. Overwatering also causes the leaves to turn yellow and wilt. This is because the soil becomes soggy and the roots cannot absorb enough oxygen. It is important to avoid overwatering corn plants. Watering should only occur when necessary.

In conclusion, using excess water on corn plants can cause leaves to get burnt or turn brown. For more information on proper corn plant watering, contact your local soil expert.

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