Data provided by the participants of the Consortium of California Herbaria

View additional distribution information on the Jepson eflora

Western sword fern (Polystichum munitum) is a large evergreen fern with dark green fronds that grow in a tight clump, spreading out radially from a round base. It grows up to 6 feet tall and 5 feet wide and is moderate to fast growing. Individual fronds live for 1.5-2.5 years and remain attached to the base after withering.

It is excellent as an ornamental groundcover for shade. Plant in partial to full shade and give moderate to regular water. It prefers well-draining, rocky, acidic soil but can tolerate clay.

This plant attracts butterflies and hosts a likely total of 3 species of butterfly and moth. It is deer and rabbit resistant.

Plant type

Fern

Size

2 - 6 ft Tall
2 - 3 ft Wide

Form

Upright, Fountain

Growth rate

Moderate

Dormancy

Evergreen, Summer Semi-deciduous

Fragrance

None

Special uses

Containers, Deer resistant, Groundcover, Lawn alternative

Sun

Partial Shade, Deep Shade

Water

Moderate, High

Summer irrigation

Max 2x / month once established

Ease of care

Easy

Cold tolerance

Tolerates cold to 15° F

Soil drainage

Medium, Slow

Soil description

Tolerant of a variety of soils as long as adequate moisture is available; slightly drought-tolerant once established, but best with at least a weekly deep watering.
Soil PH: 4.0 - 7.0

Maintenance

Dead fronds may be removed to improve appearance

Sunset Zones

4*, 5*, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20*, 21*, 22*, 23*, 24*

Site type

Wooded hillsides, slopes, rarely cliffs, outcrops

Plant communities

Chaparral, Closed-Cone Coniferous Forest, Inland Closed-Cone Coniferous Forest, Lower Montane Coniferous Forest, North Coastal Coniferous Forest, Redwood Forest

Good as understory to large trees along with Meadow Rue, Maidenhair Fern, Deer Fern (Blechnum spicant), Western Polypody Fern, and Wild Ginger

Caterpillars
Butterflies

Butterflies and moths supported

0 confirmed and 3 likely

Confirmed Likely

Reticulated Decantha Moth

Decantha boreasella

Diarsia esurialis

Thallophaga taylorata