Light: Bright indirect sunlight year-round. For even growth, give the plant a quarter turn every week or so to expose all sides to sunlight.
Water: Water thoroughly, allowing soil to dry out a little between waterings. Too much water can lead to root rot. Water sparingly in winter, but do not allow soil to dry out completely, which can cause foxtail fern to shed its leaflets. Remember to use tepid water to water your house plants.
Humidity: Prefers moist air. Aim to maintain 40-50% relative humidity. Set pot on a tray of wet pebbles and mist leaves with room-temperature water. Indoor air can become extremely dry in winter; use a cool-mist room humidifier near your plant, if needed.
Temperature: Average room temperatures 65-75°F/18-24°C. Foxtail fern will tolerate a minimum of 50°F/10°C. Keep this plant away from heat/AC vents.
Soil: All-purpose, good-quality potting mix
Fertilizer: Feed monthly spring through fall with a balanced (such as 10-10-10 NPK) water-soluble houseplant fertilizer.
Ferns are non-toxic according to the ASPCA