Identifying and Treating Spider Mites on Indoor Palms

The Hidden Threat: Spider Mites

Indoor palms often develop brown leaves and a fine, cotton-like webbing under fronds. This is classic spider mite damage. These tiny arachnids thrive in warm, dry indoor air—exactly the conditions found in many homes during winter.

Effective Treatment

1. Take the palm outdoors (or to a bathtub).
2. Spray thoroughly with 70% isopropyl alcohol in a spray bottle. This kills mites on contact.
3. Rinse the next morning with a strong jet of water to remove dead mites and residue.
4. Return indoors and mist daily. High humidity deters re-infestation.
5. Prune severely damaged fronds once new growth emerges.

Prevention

Keep humidity up with a pebble tray, humidifier, or regular misting. Inspect new plants before bringing them inside. Spider mites are the most common indoor palm pest; mealybugs and scale are less likely unless introduced on another plant.