Shriveled Aerial Roots on New Phalaenopsis: Humidity Issue

Why Are the Aerial Roots Drying Up?

Your new "moth orchid" (Phalaenopsis) had one shriveled aerial root at purchase; now several more have shriveled. You're watering every 7–10 days in a cool, damp New Zealand winter.

Cause: Low Humidity Around Exposed Roots

Aerial roots need ambient humidity to stay plump. In a cold, damp house with heating, the air can be very dry. The exposed root portions desiccate and die, though the portions inside the pot may remain healthy.

Solutions

• Increase humidity: Pebble tray with water (pot above water line), humidifier, or group plants together.
• Warm, airy spot: Move away from cold drafts; 65–75°F with gentle air movement.
• Water correctly: Wait until mix is barely moist (not on a schedule). Cool weather = slower drying = less frequent watering.
• Morning watering only.

Don't Worry About the Dead Aerial Roots

Shriveled aerial roots are cosmetic. They won't recover, but they don't harm the plant. Focus on keeping the potted roots healthy with proper moisture cycle and humidity.

Your Phalaenopsis should stabilize and grow new, healthy aerial roots once conditions improve.