Answer: Ferns generally like high humidity, bright to medium light but not direct sun, consistently moist soil, and normal to cool room temperatures. In other words, conditions mimicing the woodland forest where many of them are native to. To increase humidity around the plant, set the pot on a shallow tray of water on top of pebbles to keep the water from soaking into the pot. Once a month, water slowly and deeply to allow water to run out of the pot and leach away salt build-up, which can also cause yellowing. Finally, your fern may be suffering from tranplant shock. Try to provide the conditions described and it might perk up!
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