Wildflower Archive

woodland fern

Northern oak fern

Gymnocarpium dryopteris

Northern oak fern (Gymnocarpium dryopteris)1 of 2
Billeder af nordens flora

Native to much of the USA and southern Canada

Circumboreal, south to upland Virginia, Iowa, New Mexico, Arizona and Oregon

  • Light Full sun to shade Sun tolerance
  • Moisture Moist Moisture preference
  • Zones 1–8 Cold to heat range
  • Bloom Flowering time
  • Height up to 16 in to 41 cm
  • Life cycle Perennial Annual to perennial
Full details, see below

In the garden

A woodland fern for sun through shade and evenly moist soil. At up to 16 in, it tucks into shade gardens and woodland edges. Hardy in USDA zones 1–8.

Growing conditions

Light
Full sun Partial shade Full shade
Moisture
Dry Moist Wet

Hardiness zones

Find your zone:

Full plant details

Where it grows

Habitat
WoodlandThe wild plant community it grows in.
Native range
Much of the USA and southern CanadaUnited States (29): AK, AZ, CO, CT, IA, ID, IL, MA, MD, ME, MI, MN, MT, ND, NH, NJ, NM, NY, OH, OR, PA, RI, SD, UT, VT, WA, WI, WV, WY. Canada (6): BC, NB, NL, NS, ON, PE. Where it grows wild on its own, by state and province.
Native distribution
Circumboreal, south to upland Virginia, Iowa, New Mexico, Arizona and OregonThe same native range, usually more exact than the state list, and often noting where it has spread beyond it.

Growing conditions

Light
Full sun to shadeHow much sun it takes, from full sun to full shade.
Moisture
MoistThe soil dampness it prefers, from dry to wet.
Hardiness zones
USDA 1–8 · Canadian 0–8The cold-to-heat climate range it survives.
Soil
Moist, rich soilsThe soils it grows in naturally.
Soil texture
Light to medium (sandy to loamy)The soil grade it prefers, from sand to clay.
Soil pH
Mildly acid to mildly alkalineThe acidity to alkalinity it tolerates (7 is neutral).

Growth & form

Height
up to 16 in (to 41 cm)Typical mature height.
Spread
~1 ft (0.3 m)How wide one plant gets, a guide to spacing.
Life cycle
PerennialWhether it lives a single season (annual), two (biennial), or returns for years (perennial).
Growth rate
SlowA relative ranking versus other plants of the same type (USDA), not an absolute rate.

Flowers, foliage & fruit

Type
FernWhat kind of plant it is.
Flower color
Not ApplicableThe bloom color, or colors.
Toxicity
None knownWhether any part is poisonous to people or pets.