Sunburn from direct sun
Pale, dry, bleached-to-brown patches on the side facing the window are sunburn — the single thing this plant can't shrug off.
Diagnosis
Sunburn from direct sun
What's happening
Cast Iron Plant earned its name in dim Victorian parlors; it thrives in deep shade and is not built for direct sun. When strong rays hit the broad leaves through a window, they scorch the tissue, leaving dry, faded, brown-to-bleached patches that won't recover — usually worst on the blades nearest the glass and on the sunward face.
How to fix it
Move the plant well back from the window, into a spot with low to medium indirect light, or filter the harsh rays with a sheer curtain. The scorched patches won't turn green again, so cut the worst-damaged leaves off at the base if you want a tidier look; the plant will slowly replace them with healthy growth once it's out of the direct sun.
What fixes it
- A full-spectrum LED grow light — If a bright window was your only light source, a gentle full-spectrum grow light gives even light without the scorching this shade-lover hates.
If that doesn't fix it
This is general guidance based on common symptoms; individual plants vary.
Read the full Cast Iron Plant care guide →
Reviewed June 2026 · how we check this