Light:

Shade to partial sun (north, east or west exposure).

Temperature:

Maintain as a potted plant at indoor temperatures above 60°F.

Humidity:

Preferably 50% or higher.  The higher the humidity the better.  They suffer from long periods of low humidity.

Watering:

Soil should remain evenly moist.   Do not dry out.   Fronds will be damaged by wilt.   Plastic pots for ferns are better than clay because they hold more moisture.

Fertilizer:

Use low levels of fertilizer.  Fertilize once a month with a dilute solution.  Sensitive to high salt levels.

Pruning:

Prune damaged or yellowing fronds as needed.

Insects and Disease:

Highly susceptible to scale and slug and snail damage.

Comments:  

Maidenhair ferns or adiantums need high humidity and even moisture to grow successfully.   When growing in a home situation, cluster plants with other plants on pebble trays for humidity or keep water in a saucer to ensure constant moisture.