Yellow leaves on Air plant most often point to a watering problem. On this plant, the first signs are often mushy rotting base and leaves pulling loose. Check the causes below to find which one fits, then follow its fix.
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Most likely cause
Rot from a soggy centre. Always shake excess water out of the centre after a soak and let it dry upside-down for an hour. Standing water in the cup is what actually rots it, not the watering itself.
What’s causing it
Thirst (under-soaking)
How to tell
The leaves feel papery and curl inward, sometimes showing exaggerated leaf curl, because it hasn’t had a proper soak recently.
The fix
Soak it fully in room-temperature water for 20-30 minutes once a week (more in a dry, heated home), then shake it dry.
Too little light
How to tell
The yellowing comes with pale, stretched new growth leaning toward the nearest window. That combination shows that the spot is too dim for Air plant.
The fix
Move it to a brighter spot, but keep it out of harsh midday sun, which scorches.
Prevention
Give it a full soak weekly rather than relying on misting alone, keep it somewhere bright, and always shake out standing water afterwards.