Check the soil before adding water. Thoroughly moisten entire soil area in the pot and pour off any excess that drains through. Do not let the plants sit in water for any length of time or the fronds will yellow or die-back. Dry frond tips may indicate a lack of water and low humidity. Don't be heavy-handed with fertilizer.
Ferns require very little.
Feed ferns lightly about three to four times per year with a water-soluble, low nitrogen fertilizer. If fronds yellow, increase to four or five times per year. To control and prevent pests on ferns, wash the plant completely with a water spray. Be sure to not mistake the brown fuzzy-looking spores on the underside of the leaves for insects. Avoid using pesticides on ferns, as some ferns are quite sensitive to chemical insecticides.