Step-by-step explanation:
The presence of a fine, white layer around the base of the fern, coupled with the plant looking dried out and starting to die, could indicate that the fern has been moved to soil with poor drainage and high salt content. This white layer is possibly a salt residue left behind as water evaporates from the soil.
Excess salts in the soil can lead to water imbalances within the plant, causing it to lose water faster than it can absorb it. This can result in wilting and the appearance of a dried-out plant.
To remedy this situation, it's essential to transplant the fern to a soil type that provides better drainage and has lower salt levels. Additionally, you may need to flush the soil with clean, distilled water to help leach out excess salts if the problem persists.