Wildflower Archive

woodland fern

Cystopteris fragilis complex

Cystopteris fragilis

Cystopteris fragilis complex (Cystopteris fragilis)1 of 2
Cystopteris fragilis-Woodsia ilvensis nf

Native to much of the USA and southern Canada

Newfoundland to Alaska, southern locally to Pennsylvania, Virginia mountains, northern Indiana, Arkansas, Texas and California

  • Light Partial shade Sun tolerance
  • Moisture Moist Moisture preference
  • Zones 1–10 Cold to heat range
  • Bloom Mar–Aug 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 partial shade and evenly moist soil. At up to 16 in, it tucks into shade gardens and woodland edges. Hardy in USDA zones 1–10.

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 (31): AK, AZ, CA, CO, CT, IA, ID, IL, KS, MA, ME, MI, MN, MT, NC, ND, NE, NH, NM, NV, NY, OH, OR, PA, SD, UT, VA, VT, WA, WI, WY. Canada (5): NB, NL, NS, ON, PE. Where it grows wild on its own, by state and province.
Native distribution
Newfoundland to Alaska, southern locally to Pennsylvania, Virginia mountains, northern Indiana, Arkansas, Texas and CaliforniaThe same native range, usually more exact than the state list, and often noting where it has spread beyond it.

Growing conditions

Light
Partial shadeHow much sun it takes, from full sun to full shade.
Moisture
MoistThe soil dampness it prefers, from dry to wet.
Hardiness zones
USDA 1–10 · Canadian 0–9The cold-to-heat climate range it survives.
Soil
Moist, neutral soil among limey rocksThe soils it grows in naturally.
Soil texture
Light to heavy (sandy to clay)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 (0.2 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).

Flowers, foliage & fruit

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