Boston Fern Nephrolepis exaltata
At a glance
- Light
- Medium indirect
- 1000–10000 lux
- Water
- Every 3–5 days
- Soil consistently moist but not soggy
- Humidity
- 70–80%
- Temperature
- 16–24°C
- Ideal 18–22°C
- Soil pH
- 5–6.5
- moisture-retentive
- Mature size
- 90 cm tall
- 90 cm wide
- Native to
- Tropical regions worldwide, Florida, Mexico, West Indies, Central America
- Growth
- Moderate
- Rosette
Watering calculator
Estimate how often to water your Boston Fern based on pot size, light, and season.
Always check the top 2 cm of soil before watering. Calculator output is an estimate, not a schedule.
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Compare with similar plants
| Trait | Boston Fern Nephrolepis exaltata | Spider Plant Chlorophytum comosum | Calathea Calathea orbifolia |
|---|---|---|---|
| Light | Medium indirect | Bright indirect | Medium indirect |
| Water | 3–5 days | 5–10 days | 5–7 days |
| Pet safe | Pet-safe | Pet-safe | Pet-safe |
| Difficulty | Moderate | Very Easy | Challenging |
| Mature size | 90 cm | 60 cm | 60 cm |
Light requirements in detail
Boston Fern prefers medium indirect (1000–10000 lux) . Bright indirect ideal; tolerates lower light but growth slows; avoid direct sun
A spot 1–2 meters from a bright east or south-facing window usually fits this range. Direct afternoon sun through unfiltered glass can scorch leaves; sheer curtains help diffuse it.
Watering in detail
Water Boston Fern every 3– 5 days during the growing season, allowing Soil consistently moist but not soggy to dry between waterings. Reduce frequency in winter when growth slows.
Consistent moisture matters here — long dry spells will show up as crispy leaf edges.
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Frequently asked questions about Boston Fern
How often should I water Boston Fern?
Water Boston Fern every 3–5 days during the growing season, allowing Soil consistently moist but not soggy to dry between waterings. Reduce frequency by 30–50% in winter.
What kind of light does Boston Fern need?
Boston Fern prefers medium indirect (1000–10000 lux). Bright indirect ideal; tolerates lower light but growth slows; avoid direct sun
Is Boston Fern toxic to cats?
Boston Fern is non-toxic to cats according to the ASPCA Animal Poison Control Center. Mild stomach upset is still possible if a cat chews the leaves, but it will not cause poisoning.
Is Boston Fern toxic to dogs?
Boston Fern is non-toxic to dogs according to the ASPCA. Mild stomach upset is still possible if a dog chews the leaves.
How big does Boston Fern grow?
Boston Fern reaches about 90 cm tall and 90 cm wide at maturity. Growth rate is moderate.