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Giant sword fern
Also known as: Purple-stalked sword fern, Dallas fern, Macho fern, Sword fern, Verona fern, Whitman fern, Broad sword fern
Giant sword fern (Nephrolepis biserrata) is a fern found in tropical regions around the world. It prefers shady conditions and moist, well-drained soil. Giant sword fern can grow to about 1.4 m in height. The individual leaves take on a papery texture.
Scientific classification
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Perennial
Lifespan
1.8 m
Spread
Green
Leaf Color
Non-dormant
Dormancy
Evergreen
Leaf type
20 - 38 ℃
Ideal Temperature

Images of Giant sword fern

Distribution of Giant sword fern

Distribution Map
Giant sword fern is native to diverse tropical and subtropical regions, its natural range spanning across parts of South America, Africa, Asia, and Oceania. This species has also been introduced to other tropical areas where it is now cultivated, though the overview does not specify whether it has become naturalized in these places.
Native
Cultivated
Invasive
Introduced
No species reported
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Habitat
Swampy
Hemisphere Trend Curve

Culture

Interesting Facts
Nephrolepis exaltata var. bostoniens is a drooping foliage-viewing plant, but in the seedling stage, it grows gracefully upward. As it continues to grow, its branches gradually drop, and then it can be made into a hanging plant for display.
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Quickly Identify Giant sword fern

1
Feather-like fronds reaching up to 4 feet (120 cm) in length.
2
Leaflets arranged oppositely along a central axis, creating delicate texture.
3
Vibrant bright green coloration of leaflets.
4
Large lanceolate fern blades measuring 3.3 to 5 feet (1 - 1.5 meters) long.
5
Leaves with pinnate veins extending out into finely serrated margins.
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Care Guide for Giant sword fern

Every week
Water
Partial sun
Sunlight
20 - 38 ℃
Ideal Temperature
Garden Soil
Soil Type
Water: Giant sword fern originates from humid subtropical and tropical regions, thriving in consistently moist environments. It prefers evenly moist soil and requires weekly watering. As an evergreen plant, regular misting helps replicate its natural humidity, supporting its lush foliage.
Fertilize: Giant sword fern thrives with monthly high nitrogen fertilizer during the growing season to enhance foliage density. Use a quarter-strength solution and reduce to bi-monthly in winter. Water thoroughly post-application to prevent root burn. Novices should choose slow-release granules; experienced gardeners may prefer liquid formulas.
Pruning: Giant sword fern thrives with early spring pruning by removing dead or damaged fronds to enhance circulation and encourage new growth. Regular trimming maintains shape, controls size, and minimizes pest and disease risks, promoting a healthier, denser plant throughout the season.
Propagation: Giant sword fern propagates effectively through division by gently separating clumps at the root ball. Ensure each section has a rhizome for growth. Use a sterilized blade if cutting. Plant divisions in a moist, well-draining medium rich in organic matter for optimal establishment.
Repotting: Repot giant sword fern every 2-3 years in spring for optimal growth. A spacious pot accommodates its large root system. After repotting, ensure indirect light and consistent moisture, using well-draining, humus-rich soil to support giant sword fern's lush foliage for a healthy appearance.
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