🍂 The calathea versus the radiator
A worked example: this case follows the usual course of the problem and is not a diary of one particular plant.
How it arrived
A patterned calathea on a shelf above a radiator, watered faithfully with cold tap water. Every leaf ringed in brown, crispy edging; new leaves emerging already damaged. The owner was doing everything 'right' and losing anyway.
The wrong first guess
More watering, then misting. Neither touches the two actual causes - misting raises humidity for minutes, not the sustained 60%+ this rainforest-floor plant expects, and the tap water itself was part of the problem.
The actual diagnosis
The signature calathea complaint from the profile, from both barrels at once: dry radiator air, plus chlorine, fluoride and salts in hard tap water - both print as brown crispy edges.
The rescue, step by step
- Moved it off the radiator shelf to a bright, sunless spot in the bathroom - the one naturally humid room.
- Switched to filtered water (rainwater or overnight-rested tap water also qualify), room temperature, keeping soil lightly moist rather than cycling between soggy and dry.
- Trimmed the brown edges with scissors, following the leaf shape - cosmetic, but it stops the eye reading the whole plant as dying.
- Accepted that every already-damaged leaf stays damaged; the verdict would come from new leaves only.
Timeline
Where it ended up
The problem is solved; the evidence remains. Calathea leaves do not heal, so recovery here means clean new growth gradually outnumbering the scarred old guard.
The lesson
When a humidity-lover crisps at the edges, look at the air and the water before the watering can - and judge your fix only by the leaves that open after it.
More case files
🪴 Plant first-aid kit
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