Dryopteris filix-mas 'Robust Male Fern'

Robust Male Fern

Dryopteris filix-mas ‘Robust Male Fern’ — commonly called Robust Male Fern — is a hardy, deciduous fern valued for its strong, upright to arching fronds and bold, architectural presence in shaded landscapes. Fresh green fronds emerge in spring, unfurling into large, finely divided foliage that remains clean and attractive through the growing season before turning tan and dying back in fall. Its vigorous, clump-forming habit provides dependable structure and texture in woodland settings.

Mature Size:
Width: 24–36 in
Height: 24–36 in

USDA Zones: 4a–8b
Light: Partial shade to full shade (tolerates light sun with adequate moisture)
Soil: Moist, well-drained, humus-rich soils
Water: Moderate; prefers consistent moisture
Wildlife: Generally not favored by deer; provides cover for small beneficial insects

Features & Landscape Uses:
Form: Upright to arching, clump-forming fern with a bold, vase-shaped habit
Excellent for woodland gardens, shaded borders, naturalized areas, and mass plantings
Adds strong texture and structure to shade gardens
Low maintenance and long-lived

Maintenance:
Cut back old fronds in late fall or early spring
Divide clumps in spring if needed
Mulch to maintain soil moisture and improve soil quality

Plant type

Fern

Height

24-36''

Width

24-36''

Hardiness zones

4–8

Sunlight

Full Shade, Partial Shade

Leaf color

Green

Fall color

Green

Attracts

Butterflies

Soil

Well Drained

Landscape use

Mass Planting, Rock Garden

Shape

Arching, Clumping

Fragrant

Yes

Deer resistant

Yes

Drought tolerant

No