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Boston Fern
IntermediateNephrolepis exaltata
Classic fern with elegantly arching fronds. Excellent air purifier, thrives in high-humidity areas like bathrooms. A hanging basket staple.
About
Nephrolepis exaltata, the Boston fern (sword fern), is a fern in the family Nephrolepidaceae widespread across the world's tropics and subtropics, with the cultivar 'Bostoniensis' especially popular. Its bright green, finely pinnate fronds arch and cascade gracefully, making it a classic choice for hanging baskets. It is well known for air-purifying ability and, loving humidity, it thrives in damp spots such as bathrooms and kitchens. It prefers bright indirect light; direct sun damages the fronds. Sensitive to drying out, it does best with consistently moist soil and high ambient humidity. Drought or dry air browns the frond tips and causes leaf drop. Somewhat cold-sensitive, so mind the minimum winter temperature.
Source: Wikipedia (CC BY-SA 4.0)
Lifespan of the Boston Fern
The Boston Fern lives 10-20 years.
Size of the Boston Fern
The Boston Fern grows to 30-90cm.
Temperature & humidity for the Boston Fern
The ideal temperature for the Boston Fern is 15〜28℃. Ideal humidity is 60〜80%.
Basic Info
Origin
Tropics and subtropics worldwide
Lifespan
10-20 years
Size
30-90cm
Temperature
15〜28℃
Humidity
60〜80%
Watering & Fertilizer
Liquid fertilizer monthly spring-fall
Growing Tips
Placement
Bright indirect light. Burns in direct sun
Watering
Keep soil slightly moist. Dries out = leaf drop
Humidity
Loves humidity. Near bathroom or kitchen is ideal
Temperature & Overwintering
Optimal range is 15-28°C. It is somewhat cold-sensitive, so keep it indoors in winter where minimum temperatures do not drop too low.
Soil & Repotting
Use a moisture-retentive mix based on peat moss or leaf mold, and repot one size up once roots fill the pot.
Notes
Direct AC drafts cause drying and death
Boston Fern FAQ
QWhat is the growing difficulty level for Boston Fern?
Intermediate. A variety suitable for intermediate growers. Requires some cultivation experience and knowledge of environment management. Pay careful attention to temperature and humidity control.
QWhat is the ideal temperature for Boston Fern?
The ideal temperature for Boston Fern is 15〜28℃. Recommended humidity is 60〜80%. Avoid sudden temperature changes and maintain a stable environment.
QWhat is the lifespan of Boston Fern?
The average lifespan of Boston Fern is 10-20 years. With proper cultivation environment and nutrient management, you can keep it healthy for a long time.
QHow large does Boston Fern get?
The mature size of Boston Fern is 30-90cm. This may vary slightly depending on cultivation environment and individual differences.
QHow should I water and fertilize Boston Fern?
Boston Fern: watering & fertilizer — Liquid fertilizer monthly spring-fall. Aim for appropriate frequency and amount.
QWhat is the typical price for Boston Fern?
The price of Boston Fern varies significantly by variety, characteristics, size, and lineage. Please check GrowerDirect's price guide for the latest market information.
Last updated: June 24, 2026
Growing Specifications
- USDA Zone
- 10–12
Sources: Missouri Botanical Garden Plant Finder - Nephrolepis exaltata
References & Sources
Edited & verified by: GrowerDirect Editorial Team
The classifications, regulations, and growing data on this page are created and verified based on the primary information database below.
Taxonomy & Authority
Regulations & Conservation Status
Foliage plant. Confirmed by document review to be non-applicable to CITES Appendix (Flora), designated invasive species, or designated animals (the genus does not appear in the CITES flora section; Dracaena spp. listings in CITES refer to a reptile genus of the same name; the plant Dracaena is not applicable).
Sources: CITES Appendices I/II/III (flora section, grepped via dbca mirror) / CITES Appendices (official) / Ministry of the Environment List of Specified Invasive Alien Species
Regulations may change. Always verify the latest information with the relevant authorities.
Related Species
Find listings for this species
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