Low humidity
Crispy brown edges in dry indoor air are the single most common Rattlesnake Plant complaint.
Diagnosis
Low humidity
What's happening
Calathea lancifolia comes from humid Brazilian rainforest floors and demands moisture in the air. In dry household air, especially near a heating vent or air conditioner, the thin wavy leaf margins lose water faster than the roots can replace it, so the edges and tips brown and go crisp while the leaf centers stay green.
How to fix it
Raise the humidity to 50% or higher: group it with other plants, set the pot on a tray of pebbles and water, or run a small humidifier nearby — and move it well away from vents and drafts. Trim the worst of the browned edges with clean scissors, following the leaf's natural wavy shape, so it looks tidy while new growth comes in healthy.
What fixes it
- A small room humidifier — A small humidifier near the plant keeps edges from crisping — Rattlesnake Plant truly needs the moist air a pebble tray alone can't always provide.
If that doesn't fix it
This is general guidance based on common symptoms; individual plants vary.
Read the full Rattlesnake Plant care guide →
Reviewed June 2026 · how we check this