Photo by Melody

PlantFiles: Tennessee Ostrich Fern, Glade Fern, Narrow Leaf Spleenwort, Narrow Leaf Glade Fern
Diplazium pycnocarpon

Family: Woodsiaceae
Genus: Diplazium (dy-PLAY-zee-um) (Info)
Species: pycnocarpon (PIK-no-kar-pon) (Info)

Synonym:Asplenium pycnocarpon
Synonym:Athyrium pycnocarpon
Synonym:Homalosorus pycnocarpos

6 members have or want this plant for trade.


36-48 in. (90-120 cm)

24-36 in. (60-90 cm)

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)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)

Sun Exposure:
Partial to Full Shade


Bloom Color:
White/Near White

Bloom Time:

Grown for foliage

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

Soil pH requirements:
Unknown - Tell us

Patent Information:

Propagation Methods:
By dividing the rootball
From spores

Seed Collecting:
Unknown - Tell us

Click thumbnail
to view:

By mystic
Thumbnail #1 of Diplazium pycnocarpon by mystic

By mystic
Thumbnail #2 of Diplazium pycnocarpon by mystic

By wormfood
Thumbnail #3 of Diplazium pycnocarpon by wormfood


2 positives
2 neutrals
No negatives

Gardeners' Notes:

Neutral bottlegreen On May 8, 2010, bottlegreen from Saint Paul, MN wrote:

The photograph of this fern offered by Garden Harvest Supply certainly doesn't look like Athyrium (Diplazium) pycnocarpon, nor does their description of the fern as "lacy" sound like the real thing. I'm on my second attempt to grow this from spores. This time I've actually gotten gametophytes, but they don't seem to be having sex. Any suggestions?

Positive GranMona On Apr 24, 2010, GranMona from Franklin, TN wrote:

Bought @ end of season, 10/09...8 inch pot. Intended to plant or garage for winter, but forgot. I left it outside, under the eave of our 2 story house. We had a very harsh winter in Franklin, Tn and I expected the little feller to be dead....but I was WRONG! He's sprouted, I moved him to a bigger pot, and he's so happy!
I expect to leave him in this big pot, due to heavy spreading I've read about. Anyone else in middle Tennessee have the same guy? What can you share? I was truly amazed with the plant, after our harsh winter. I will probably garage him this winter, unless someone in zone has comments? Also, I plan to start a fern garden...hints appreciated and cuttings as well.
Happy Spring

Positive wormfood On Feb 20, 2009, wormfood from Lecanto, FL (Zone 9a) wrote:

I just picked up a 4-pack at local box store for 5bucks. They look pretty good, starting to sprout in the bag. Planting today in yogart containers with potting mix that has the wetting agent added.. They are long tubers and I'm planting them longways 1/2" deep. I'll keep this updated. BTW, there were 6 in the package.

Neutral tcfromky On Oct 7, 2004, tcfromky from Mercer, PA (Zone 5a) wrote:

This plant is of special concern in Wisconsin (and possibly other states as well). The name is translated as: Diplazium: Greek diplasion for "double", referring doubled spore cover
pycnocarpon: pycnos for "compact, close"; carpos for "fruit"


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

Tuscaloosa, Alabama
Winter Haven, Florida
Tennille, Georgia
Cleveland, Ohio
Brookhaven, Pennsylvania
Hermitage, Pennsylvania
Franklin, Tennessee
Lipan, Texas
Santo, Texas
Wytheville, Virginia

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