Dicksonia Species, Harsh Tree Fern, Rough Tree Fern, Wheki

Dicksoniasquarrosa

Genus
Dicksonia (dik-so-nee-uh)
Species
squarrosa (skwa-RO-suh)
Synonym
Balantium squarrosum
Dicksonia gracilis
Dicksonia squarrosa var. gracilis
Trichomanes squarrosum
Sun Exposure
Light Shade
Partial to Full Shade
Foliage
Grown for foliage
Evergreen
Height
4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)
10-12 ft. (3-3.6 m)
12-15 ft. (3.6-4.7 m)
15-20 ft. (4.7-6 m)
Spacing
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)
Hardiness
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)
Danger
Handling plant may cause skin irritation or allergic reaction
Bloom Color
Inconspicuous/none
Bloom Time
N/A
Other Details
Category
Ferns
Water Requirements
Requires consistently moist soil; do not let dry out between waterings
Foliage Color
Bronze
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
Patent Information
Non-patented
Propagation Methods
From spores
Seed Collecting
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Regional

This plant is said to grow outdoors in the following regions:

Eureka, California

Mckinleyville, California

Thousand Oaks, California

Portland, Oregon

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Gardener's Notes:

2
positives
2
neutrals
0
negative
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C
El Sobrante, CA (Zone 9b) | April 2007 | neutral

Native to New Zealand. Available from Thimble Farms, B.C., Canada.

G
G
Beautiful, BC (Zone 8b) | December 2005 | positive

Dark green foliage, graceful & elegant. Although defoliated at -15C, regrew from the roots to a nice multi-stemmed treefern. I prefer thi...Read More

K
(Zone 10a) | September 2003 | neutral

This tree-fern is from New Zealand, where it is one of the commonest tree-ferns, although I didn't see when I visited new Zealand.
...Read More

P
Acton, CA (Zone 8b) | September 2003 | positive

Though less common than its cousin D antartica, this is a nicer looking, neater fern, with an almost black, straight, thinner trunk and w...Read More

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