Root Rot

Overwatering

To address root rot in Boston ferns, first, stop watering immediately and allow the soil to dry out. If the plant is severely affected, remove it from its pot, trim away any black, mushy roots, and repot in fresh, well-draining soil. Ensure the pot has adequate drainage holes. Going forward, water only when the top inch of soil feels dry to the touch, and avoid letting the pot sit in standing water.

Brown and Crispy Leaves

Underwatering

Boston ferns require consistently moist soil to thrive, but not waterlogged conditions. If you notice brown and crispy leaves, it's a sign of underwatering. To remedy this, gradually increase watering frequency, ensuring the top inch of soil is slightly moist at all times. Consider using a self-watering pot or a drip irrigation system for consistent moisture. Additionally, misting the leaves regularly can help increase humidity around the plant, mimicking its natural environment.

Spider Mite Infestation

Spider mites are tiny pests that thrive in warm, dry conditions. They feed on the sap of the Boston fern, causing the leaves to turn yellow and drop.

To combat spider mites, increase humidity around your Boston fern, as these pests dislike moist conditions. You can mist your fern daily or place a humidifier nearby. Additionally, washing the fern with a gentle spray of water can help dislodge and remove mites. For severe infestations, applying neem oil or insecticidal soap directly to the affected areas can be effective. Always follow the product's instructions and test on a small area first to prevent leaf burn.

Fungal Leaf Spot

Caused by a variety of fungal pathogens, including Cercospora and Alternaria species, which thrive in moist conditions.

To manage fungal leaf spot, it's crucial to avoid overhead watering to keep the foliage dry and improve air circulation around your fern. If the infection is mild, remove the affected leaves and dispose of them properly. For more severe cases, applying a fungicide may be necessary. Ensure to use a product that is safe for ferns and follow the application instructions carefully. Regularly inspect your fern for early signs of infection to prevent its spread.