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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


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

El Cerrito, California

Hayward, California

Knights Landing, California

Gardeners' Notes:


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.


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.


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.