Photo by Melody

PlantFiles: California Maidenhair Fern
Adiantum jordanii

Family: Pteridaceae
Genus: Adiantum (ad-ee-AN-tum) (Info)
Species: jordanii (jor-DAN-ee-eye) (Info)


18-24 in. (45-60 cm)

Unknown - Tell us

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)
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:
Partial to Full Shade

Unknown - Tell us

Bloom Color:

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:
Unknown - Tell us

Propagation Methods:
Unknown - Tell us

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

Click thumbnail
to view:

By Cretaceous
Thumbnail #1 of Adiantum jordanii by Cretaceous

By Cretaceous
Thumbnail #2 of Adiantum jordanii by Cretaceous


1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive Cretaceous On Mar 24, 2007, Cretaceous from El Sobrante, CA (Zone 9b) wrote:

Adiantum jordanii is native to the states of California and Oregon in the USA, and also to Mexico.

This fern has thrived here in zone 9b (shaded by other larger ferns).

Unfortunately, this species is known to be associated with Phytophthora ramorum, a plant pathogen which causes Sudden Oak Death (SOD). For this reason Adiantum jordanii is not commonly cultivated and is very hard to find in nurseries.

Because of the pathogen association, it would be extremely unwise to take a plant from the wild.


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

El Cerrito, California
Los Angeles, California

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