Perennials & Grasses
Western sword fern
Polystichum munitum
Western sword fern forms an evergreen clump of upright to arching fronds that gives shaded gardens texture through the year. This Washington native typically grows about 3–4 feet tall and wide, with room for its crown to expand beneath trees or along woodland borders. Plant it in light to deep shade and humus-rich, well-drained soil. Once established, it handles dry shade better than many ferns, though consistent moisture supports fuller fronds. Group several for groundcover or use a single clump to anchor a shaded planting. Late-winter cleanup can clear aging foliage from vigorous plants before new growth.
Ask about this plant
At a glance
- Mature height
- About 3–4 feet
- Mature spread
- About 3–4 feet
- Light
- Light to deep shade
- Hardiness
- About USDA Zone 4
The right plant, the right place
Make room for something good.
Group clumps beneath trees for evergreen woodland groundcover, or place one along a shaded border. The arching fronds also provide cover for small mammals and songbirds.
Where to plant
Allow about 3–4 feet for each mature clump. Choose a site with light to deep shade; an exposed, sunny position needs dependable summer moisture.
Through the seasons
Evergreen fronds provide texture year-round. Older fronds can be removed in late winter from vigorous plants before new growth appears.
Southwest Washington gardens
Give it a good start.
Western sword fern is native to Washington and suited to Southwest Washington shade gardens. Established clumps can handle some dry shade, especially where soil has organic matter.
Soil, drainage & water
Soil rich in humus should drain freely while retaining moisture. Established clumps can cope with some dry shade, but regular moisture produces fuller fronds.
A little care goes a long way
Growing well, season after season.
Remove old fronds in late winter when the plant is vigorous. In dry or poor soil, leave more foliage in place and limit cutting.
Know what to look for
Common growing concerns.
Symptoms can have more than one cause. These notes are a starting point for observing your plant and improving its growing conditions.
Sun and drought stress
Fronds may scorch or show water stress in exposed, dry sites.
Help your plant thrive
Plant in shade. Where it receives full sun, provide reliable summer water and check soil moisture during dry spells.
Good gardens start with a conversation
Let’s find the right plant
for your place.
Ask our team about plant selection and current availability.