Why Is My Cactus Turning Brown? 6 Reasons And Solution
Your cactus may be turning brown due to five common reasons, such as overwatering in winter, underwatering, exposure to extreme temperatures, poor soil drainage, and pests/diseases.
Or, there can be other reasons like corking or fungal infection for this change of color.
The change of color does not mean that the plant is going to die. Let me guide you to learn about the reasons behind this change, and how you can handle the problem.
Looking for more information about Pests and Diseases:
Factors For Your Cactus Turning Brown
There are different factors of problems that can contribute to the change of color of cactus. Below are the most common reasons for this change with their solution.
Overwatering
One of the most common causes of cactus browning is overwatering. Cacti have evolved to live in arid climates by saving water in their mushy stems and leaves. When they receive more water than they need, their roots may become waterlogged, leading to root rot.
As the roots decay, the cactus loses its ability to take up water, resulting in a wilted appearance and eventual browning.
Solutions: Allow the soil to air out completely in between waterings. Ensure the cactus is potted in well-draining soil and a container with drainage holes.
Underwatering
On the other hand, underwatering can also lead to brown cacti. If a cactus doesn’t receive enough water, it will use up its stored water reserves and may become dehydrated. As a defense mechanism, the cactus will begin to turn brown or yellow, indicating its stress.
Solutions: To prevent underwatering, regularly check the soil moisture and water when the top inch is dry. Adjust the watering schedule based on environmental conditions and the cactus’s specific water requirements.
Sunburn
Cacti are sun-loving plants, but excessive exposure to intense sunlight can lead to sunburn. Sunburn appears as brown or yellow patches on the cactus, particularly on the side facing the sun.
Solutions: To prevent sunburn, gradually acclimate the cactus to direct sunlight, especially if it was previously kept indoors or in the shade. Providing some shade during the hottest hours of the day can also protect the cactus from intense sunlight.
Pest Infestations
Pests can be dangerous to the wellness of your plant. The red spider mite, which feeds on the sap of the cactus, is a frequent nuisance. As these tiny arachnids puncture the plant’s cells, they cause yellowing and browning. Early detection and prompt action are crucial to controlling pest infestations.
Solutions: Inspect your cactus for pests on a regular basis, and if an infestation is discovered, separate the plant and cure it with insecticide soap or other appropriate medicines.
Under Feeding
Cacti have low nutrient requirements, but underfeeding can still cause them to turn brown and exhibit signs of malnutrition. Providing a balanced, diluted liquid fertilizer during the cactus’s active growing season can help prevent nutrient deficiencies.
Solutions: Use a fertilizer specifically formulated for cacti or succulents and avoid over-fertilization, as this can be harmful to the plant.
Corking & Fungal Infection
Physical damage to a cactus, such as corking, can lead to brown spots or scars on the plant. Corking occurs when the cactus is injured or subjected to rough handling. Additionally, fungal infections can cause discoloration and browning.
Solutions: Avoiding physical damage and maintaining proper air circulation around the cactus can reduce the risk of fungal infections.
How Do You Save A Browning Cactus?
To save a browning cactus, it’s crucial to identify and address the underlying issue promptly. Here are steps to help revive your struggling cactus:
Assess the Problem: Determine the cause of browning, such as overwatering, underwatering, sunburn, pest infestations, or nutrient deficiencies. Inspect the plant carefully to identify any pests, signs of disease, or physical damage.
Adjust Watering: Allow the dirt to dry completely prior to watering again if overwatering is a concern. For underwatering, increase watering frequency and ensure the plant receives sufficient hydration.
Provide Adequate Light: Ensure the cactus is receiving the right amount of sunlight.
Pest Control: If pests like red spider mites are causing browning, use appropriate methods like insecticidal soap or neem oil to eliminate them. Isolate the affected cactus to prevent the infestation from spreading.
Fertilize: Provide a regulated, watered fluid fertilizer through the growing season if underfeeding is an issue. Use a formula designed for cacti and follow the recommended application rate.
Pruning and Healing: Trim off severely damaged or infected parts using sterilized tools. Allow any wounds to callus over to prevent infections. If corking or fungal infections do occur, prune away the affected parts and apply a fungicide to prevent further damage.
One effective method for saving your cactus when it has damaged tissue is to slice it above the affected area and then root the resulting “cutting.” This process can help ensure the survival of a healthy portion of the plant and give it a fresh start.
Optimal Environment: Ensure the cactus is in an environment with proper air circulation and suitable temperature and humidity levels.
Conclusion
So, you can save your browning cactus by quickly recognizing the core reason and applying suitable measures.
Regular monitoring and care tailored to the specific needs of your cactus species are key to restoring its health and vibrant appearance.
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