Photo by Melody

PlantFiles: Delta Maidenhair Fern
Adiantum raddianum 'Pacific Maid'

Family: Pteridaceae
Genus: Adiantum (ad-ee-AN-tum) (Info)
Species: raddianum (rad-dee-AH-num) (Info)
Cultivar: Pacific Maid

Tropicals and Tender Perennials

12-18 in. (30-45 cm)
18-24 in. (45-60 cm)

Unknown - Tell us

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)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Light Shade
Partial to Full Shade
Full Shade

Unknown - Tell us

Bloom Color:

Bloom Time:

Grown for foliage

Other details:
This plant is suitable for growing indoors
Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:
5.6 to 6.0 (acidic)

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing the rootball

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 PotEmUp
Thumbnail #1 of Adiantum raddianum by PotEmUp

By sclarke
Thumbnail #2 of Adiantum raddianum by sclarke

By Cretaceous
Thumbnail #3 of Adiantum raddianum by Cretaceous


3 positives
No neutrals
No negatives

Gardeners' Notes:

Positive youreit On Mar 11, 2010, youreit from Knights Landing, CA (Zone 9b) wrote:

I love my maidenhair! For 2-3 years, I've had it in a large pot on my north-facing front porch with Sedum makinoi 'Ogon' at its feet, dangling over the sides. Other than watering daily during hot and/or dry weather, it thrives on love alone.

Positive BayAreaTropics On Sep 18, 2008, BayAreaTropics from Hayward, CA wrote:

I would say this is without a doubt THE lushest looking Adiantum there is. When well grown it looks almost edible. Prefers a very rich potting soil,maybe best grown with feet in a shallow saucer of water,protected from wind. In one season mine has grown from a 3" pot, to a pot filling 8" pot. Does appreciate feeding a few times per summer. Give warmer summer temps than most Adiantum sp. Like most Maidenhair's they enjoy a few hours of morning sun and bright indirect light afterwords. Not for dark,dim areas.

Positive Cretaceous On Feb 17, 2007, Cretaceous from El Sobrante, CA (Zone 9b) wrote:

This fern has done well on our front porch, where it is shaded from the sun and protected from strong winds. Needs to be sprayed daily with filtered water, and fed (diluted fish emulsion) about every two-three weeks. Protect from slugs and snails. The 'Pacific Maid' Delta Maidenhair Fern is commonly found for sale in plant nurseries locally.


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

El Cerrito, California
Hayward, California
Knights Landing, California

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