Root Rot

Overwatering

To address root rot in bunny ear cactus, first, stop watering immediately and allow the soil to dry out completely. If the plant is severely affected, remove it from its pot, trim away any black, mushy roots, and repot in fresh, well-draining cactus mix. Ensure the pot has adequate drainage holes. In the future, water only when the top inch of soil is dry, and ensure the plant receives plenty of indirect sunlight.

Shriveling and Wrinkling

Underwatering

To address underwatering in bunny ear cactus, gradually increase watering frequency without overdoing it. Start by soaking the soil thoroughly until water runs out of the drainage holes, then allow it to dry out completely before the next watering. During active growth periods in spring and summer, water every 1-2 weeks. In fall and winter, reduce watering to once a month. Adjust based on your climate, indoor conditions, and the cactus's response.

Mealybug Infestation

Mealybugs are small, soft-bodied insects that feed on the sap of the bunny ear cactus, leading to weakened plants and potential secondary infections.

To combat mealybugs, start by isolating the affected plant to prevent the spread to others. Use a cotton swab dipped in alcohol to dab directly onto the pests, effectively killing them without harming the plant. For severe infestations, applying a neem oil solution or insecticidal soap directly to the plant every few days until the pests are eradicated can be effective. Ensure to check hidden areas and under leaves where mealybugs might hide.

Sunburn

Excessive direct sunlight

Bunny ear cactus enjoys bright but indirect sunlight. If your plant shows signs of sunburn, such as yellowing or brown spots on the pads, it's crucial to relocate it to a spot with filtered sunlight. Gradually acclimate it to any new lighting conditions to prevent shock. For outdoor plants, consider using a shade cloth during peak sun hours. Ensure the cactus is in a well-ventilating area to prevent heat buildup. Regularly inspect the plant for any signs of sun damage and adjust its location as needed.