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In general, for maximum growth and health, it is important to provide ferns with plenty of humidity, generous watering, lots of space, sufficient light without direct sun exposure, and rich, well-draining soil.
Moisture
Proper humidity can be one of the most difficult conditions to provide since most of us who live in temperate climates have central heat, which is very drying. Home moisture levels can be desertlike, as low as 5 to 10 percent relative humidity, well below the 40–50 percent levels recommended for ferns.
There are a few simple methods for countering that dryness. Daily watering will help. Resting potted ferns on water-filled saucers or trays that contain a layer of pebbles or broken crockery is another simple way of keeping the humidity high. Just make sure that the bottoms of the pots rest above the water, not in it. Soggy fern roots can lead to rot and untimely death. Another trick is to place ferns planted in clay pots inside a larger plastic pot lined with a damp, spongey medium such as peat moss. The clay pot will wick the moisture from the peat moss and help prevent the fern soil from drying out.