Robust Male Fern
Dryopteris filix-mas 'Undulata Robusta'

Family: Dryopteridaceae
Genus: Dryopteris (dry-OP-ter-iss) (Info)
Species: filix-mas (FY-liks mas) (Info)
Cultivar: Undulata Robusta

Category:

Perennials

Ferns

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Requires consistently moist soil; do not let dry out between waterings

Where to Grow:

Suitable for growing in containers

Height:

24-36 in. (60-90 cm)

Spacing:

36-48 in. (90-120 cm)

Hardiness:

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

Sun Exposure:

Partial to Full Shade

Danger:

Unknown - Tell us

Bloom Color:

Inconspicuous/none

Bloom Time:

N/A

Foliage:

Evergreen

Other details:

Unknown - Tell us

Soil pH requirements:

5.1 to 5.5 (strongly acidic)

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

Patent Information:

Unknown - Tell us

Propagation Methods:

By dividing the rootball

From spores

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Regional

This plant has been said to grow in the following regions:

El Cerrito, California

Atlanta, Georgia

Marietta, Georgia

Cincinnati, Ohio

Springfield, Virginia

Gardeners' Notes:

1
positive
1
neutral
0
negatives
RatingContent
Positive

On Aug 17, 2007, Cretaceous from El Sobrante, CA (Zone 9b) wrote:

This fern grows well here in zone 9b.

Neutral

On Dec 1, 2004, smiln32 from Oklahoma City, OK (Zone 7a) wrote:

Plant in a shady... sheltered location in moist rich soil. Add compost to soil yearly. Susceptible to rust and leaf spot fungus. This plant has an upright habit and reaches a height of 36". It can spread as wide as 48".