“Low humidity again? I’m not dramatic, just professionally offended.”
This looks most like mild environmental stress from dry air, which Calathea/Goeppertia often shows as dull mottling, uneven texture, and subtle loss of sheen before crispy edges appear. Because the plant is otherwise green and the issue seems stable, this reads more like a care-environment issue than a serious disease or rot problem.
What to do today
Keep care steady and reduce dry-air stress before changing anything else.
Also possible, but less likely
What would prove it
Watch new growth for improvement
The best clue is the next leaf or two. If new leaves come out smoother and less dull, the diagnosis is confirmed. If damage spreads or crisping appears, reassess for light or salt stress.
Turn this into a recovery case
One photo gives a diagnosis. Tracking proves whether the plant is recovering.
Don’t leave the diagnosis hanging 🌱
Save it now, then use the next photo to confirm if this was the right call.
Create account & save plant 🌱