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Boston Fern

Nephrolepis exaltata 'Bostoniensis'

The Boston Fern is a classic, lush fern renowned for its arching fronds and ability to purify the air. It requires consistent care to maintain its vibrant green appearance.

Boston Fern (Nephrolepis exaltata 'Bostoniensis')
Scientific name
Nephrolepis exaltata 'Bostoniensis'
Family
Lomariopsidaceae
Also known as
Sword Fern, Boston Sword Fern
Category
Houseplants
Care difficulty
Moderate
Pet safety
Non-toxic to cats and dogs

How to care for boston fern

  • Light: Prefers bright, indirect light; direct sunlight will scorch its delicate fronds. Low light can cause sparse growth.
  • Water: Keep the soil consistently moist but not soggy. Do not allow the soil to dry out completely between waterings.
  • Soil: Use a rich, well-draining, peat-based potting mix. Good drainage is crucial to prevent root rot.
  • Temperature: Thrives in temperatures between 65-75°F (18-24°C). Avoid temperatures below 55°F (13°C) and cold drafts.
  • Humidity: Requires high humidity, typically above 50%. Mist daily, use a humidifier, or place on a pebble tray.
  • Fertilizer: Feed with a diluted liquid fertilizer (half strength) every 4-6 weeks during spring and summer. Fertilize sparingly or not at all in fall and winter.
  • Propagation: Propagate by division of the root ball or by planting the small plantlets that form on its runners (stolons).

Is boston fern toxic to pets?

Pet-safe. Considered non-toxic to cats and dogs. See our guide to toxic plants for cats and dogs.

Common problems

  • Dry, crispy fronds: Indicates insufficient humidity or underwatering. Increase humidity levels and maintain consistent soil moisture.
  • Yellowing fronds/leaf drop: Can be caused by insufficient light, underwatering, or excessive direct sunlight. Adjust light and watering accordingly.

Did you know?

It was first discovered in a shipment of common sword ferns to Boston in 1894, hence its name.

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