Boston fern care

The Boston fern (Nephrolepis exaltata) is lush and pet-safe, but it is one of the thirstier houseplants. It comes from humid forests and wants consistent moisture — in the soil and in the air.

Light

Medium, indirect light is ideal: a bright room, out of direct sun. Direct sun turns the fronds yellow and crispy; deep shade makes it sparse.

Watering

Keep the soil evenly moist — never soggy, never dry. In summer that often means watering every 3 to 5 days, in winter every 5 to 7 days. Check with a finger: if the surface feels dry, water. A fern that dries out completely drops leaflets fast.

Soil and repotting

Use a rich, moisture-holding potting soil with some perlite. Repot in spring when roots fill the pot.

Humidity and temperature

High humidity is the key to a green fern. Place it in a bright bathroom, group it with other plants, or use a humidifier. Keep it between 15 and 26 °C and away from radiators, which dry the air.

Common problems

• Brown, crispy fronds and falling leaflets: dry air or dry soil. Raise humidity and water more consistently.
• Yellow fronds: too much sun, or waterlogged soil.
• Grey-brown, dull fronds in winter: heating air. Move it away from the radiator.
• Sparse growth: too little light.

Is a Boston fern safe for pets?

Yes. The Boston fern is listed as non-toxic to cats and dogs, which makes it a good choice for pet households.