Photo by Melody

PlantFiles: Florida Tree Fern, Red Hair Comb Fern
Ctenitis sloanei

Family: Dryopteridaceae
Genus: Ctenitis (tee-NY-tis) (Info)
Species: sloanei

Synonym:Ctenitis ampla
Synonym:Dryopteris ampla


Unknown - Tell us

Unknown - Tell us

USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:
Sun to Partial Shade
Light Shade


Bloom Color:

Bloom Time:

Grown for foliage

Other details:
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
From spores

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


1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive NativePlantFan9 On Oct 29, 2004, NativePlantFan9 from Boca Raton, FL (Zone 10a) wrote:

The Florida Tree Fern is unique that it is the only tree fern native to the continental U.S., besides other species found in Hawaii. It is found in moist tropical hammocks and hardwood enclosed swamps with high moisture in southern Florida in a few counties. It is listed as endangered by the state of Florida.

MORE FACTS - This fern also derives the name Red-hair Comb Fern from it's reddish-brownish spores on the underside of the leaves from which it reproduces.

Credits to ISB Atlas of Florida Vascular Plants and Aquatic/Wetlands/Invasive Plants Species list by the University of Florida.

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