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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)
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
Humidity
Loves humidity. Near bathroom or kitchen is ideal
Watering
Keep soil slightly moist. Dries out = leaf drop
Placement
Bright indirect light. Burns in direct sun
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 ボタちょく'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: BoTachoku 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
観葉植物。CITES附属書(植物)・特定外来生物・特定動物いずれも非該当を有限文書照合で確認(CITES flora section に当該属の掲載なし。Dracaena spp.掲載は同名のトカゲ属でありシダ植物Dracaenaは非該当)。
Sources: CITES Appendices I/II/III (flora section, grepped via dbca mirror) / CITES Appendices (official) / 環境省 特定外来生物等一覧
Regulations may change. Always verify the latest information with the relevant authorities.
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