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Western swordfern

Polystichum munitum

Also called Western Sword Fern, Pacific Sword Fern, Common Sword Fern, Pineland Sword Fern, Sword Fern

Western swordfern
Photo: Jami Dwyer, CC BY-SA 2.0

Western swordfern is an evergreen fern native to western North America, common in shaded coniferous forests from Alaska to California. It grows best in cool, moist conditions with well-drained, humus-rich acidic soil.

Family
Dryopteridaceae (Wood fern family)
Grows as
Fern, Perennial
Light
Shade
Water
Water regularly to keep the soil consistently moist, though it tolerates occasional drought once established.
Soil
Well-drained, acidic, humus-rich soil with some small stones.
Temperature
Cool to mild conditions; tolerates cold well, protect from prolonged heat above 30 °C.
How easy
Easy
Native range
Alaska to Mexico (Baja California Norte, I. Guadalupe)
Climate
temperate

About

Polystichum munitum, the western swordfern, is an evergreen perennial fern native to western North America, where it is one of the most abundant ferns in forested areas. It occurs along the Pacific coast from southeastern Alaska to southern California, and also inland east to southeastern British Columbia, northern Idaho and western Montana, with disjunctive populations in northern British Columbia, Canada; the Black Hills in South Dakota, United States; and Guadalupe Island off of Baja California, Mexico. Western swordfern is known to have locally naturalized in parts of Great Britain and Ireland.

Where it grows

The preferred habitat of this fern is the understory of moist coniferous woodlands at low elevations. It grows best in well-drained acidic soil of rich humus and small stones. It is very resilient and survives occasional droughts, but flourishes only with consistent moisture, and it prefers cool weather.

Other Polystichum plants

Christmas fern · Hard shield-fern · Japanese Tassel Fern · Black Shield Fern · Soft Shield Fern · Korean rockfern · Hollyfern

Text excerpted from the Wikipedia article Polystichum munitum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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