Black Spots on Aloe Plant (Causes Treatment & Prevention)

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Have you observed Black Spots on Aloe Plant? Are you worried about that? The aloe vera plants are succulents and the leaves of aloe vera have a tendency to hold much water. The plants can tolerate harsh conditions as well. The aloe vera plants will show discoloration in the leaves and dark spots if aloe vera plants are under the stress.

Aloe vera plants can exist really well in dry soil and withstand the scarcity of water for many days but not for too long. The aloe vera plants will show symptoms due to many conditions. Aloe vera plants, with the scientific name Aloe barbadensis miller, are common houseplants due to so many benefits regarding health and skin. But if your aloe vera plants are showing dark spots, then you got to see further about the causes and their treatments. In this article, you will also understand how to prevent dark spots on aloe vera plants.

Why are aloe vera plants showing dark spots?

The dark spots on leaves indicate some kind of infection that might have occurred due to fungal growth, and other issues related to sunlight, watering, and humidity. The aloe vera plants need about 10-12 hours of sunlight, many times the stressful aloe vera plants get easily affected by the pest’s attack. Pests like spider mites and aphids thrips suck the sap from the aloe vera plants making the green color fade away. 

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Causes of Black Spots on Aloe Plant

The aloe vera plant has dark spots due to the following reasons 

Overwatering the aloe vera plants 

The aloe vera plants when are overwatered there is a sure thing that dark spots will appear on aloe vera plants. The aloe vera when watered frequently becomes weak. The aloe vera needs sunlight for most of the time in the day and this makes gardeners water them a little more and this is how overwatering occurs. The aloe vera plant needs light watering during the day. Overwatered aloe vera looks mushy and the leaves start to show dark spots. 

Pests are affecting the plants 

The pests love the sap of aloe vera plants. The holes on the aloe vera eaves can also be an indication pests attack as pests eat the sap of aloe vera. Pests like aphids mainly attack the aloe vera 

Pests like aphids mainly attack the aloe vera plants. Mealybugs, mites, and even insects affect the aloe vera plants. The aloe vera becomes weak with time and shows dark spots that show the slowing up of the basic survival processes of the aloe vera plant.

For more such plant related-articles, you may also read, Monstera Leaves Turning Black/Dark Spots (Causes and How to Fix!)

Fungal infection has taken over aloe vera

The aloe vera plants being mushy and weak easily lead to the growth of fungus around them. The fungal infections make the root rot as well, not leaving the stem healthy. The aloe vera will show black spots as the roots fail to absorb the nutrients properly.

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Not getting enough sunlight

The aloe vera plants need good sunlight in a day for about 6-7 hours and the aloe vera plants will thrive well if the light is not that strong. If the spot is shaded, the aloe vera plants will slow down in the reactions for growth and staying healthy.

Pot is bothering the aloe vera plant

The pot if it is plastic will make the drainage really bad and harm the roots indirectly. The aloe vera plant grows with time and if the pot size is not of proper size then the roots will fail to extend well and absorb the nutrients and water. Leaves will become droopy and discoloration will occur.

How to treat dark spots on aloe vera plants?

Get rid of pests and diseases if any 

Diseases like anthracnose, leaf blight disease, and leaf spot, can cause dark spots on the aloe vera plants. To shield the aloe vera plants use fungicides and avoid overwatering. Use neem oil or soap solutions to get rid of aphids or pests on the aloe vera plants. 

Choose the right spot for aloe vera

The spot should get sufficient sunlight that is bright but not too intense as the plant will start to wilt. Make sure you give some shade during the strong sun rays and move the plant inside when it is cold outside. 

Check the soil 

Let the soil get dry before you moist the soil further. Dont keep the leaves wet for long. 

Choose a right pot 

Use a terracotta pot and the pot that has proper drainage holes. The plant should easily get drained and won’t stay clogged in the soil. Avoid using plastic pots

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How do you prevent black spots on aloe vera plants? 

  • Keep the indoor aloe vera plants near the west-facing windows getting indirect sunlight.
  • Check if the humidity is too low, the leaves will look dull and dry. Use a humidifier to maintain the humidity at an optimum level. 
  • Water the aloe vera plant deeply, and check if the top 1-2 inches of soil is moist and soil is drained well or not. 
  • Keep the surrounding plants clean, throw the waste away and get rid of weeds.  
  • Cover the aloe vera plants with sheets if the temperature is low. 
  • Remove the affected leaves from the plants to save them plant from getting sick. 


Why is my aloe plant turning black? 

If the aloe vera plant goes black that means the soil is waterlogged and the drainage is poor. Check the drainage of the soil, and add sand to increase the drainage. Avoid overwatering the aloe vera plant and give the plant a good amount of sunlight. Let the soil get dry before watering. 

How often do you water aloe vera? 

The aloe vera needs water but not frequently. Lightly watering the aloe vera plant is a great way to start. Though the young aloe vera plant water also deeply and not frequently again. Water the aloe vera plants every 2-3 weeks deeply making the top 2 inches wet. Water the aloe vera plant sparingly in the winter season. 

How do you treat aloe vera fungus? 

The fungus in case affects aloe vera, you can use the powdered fungicide on the bothered plant’s parts after cutting the drooping leaves that are looking dull. Wrap the affected areas with clean wet tissue paper. Using fungicide over the affected parts will not let the spores spread further. 

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