Photo by Melody

PlantFiles: Seaside Ragwort, Seabeach Goundsel, False Arnica
Senecio pseudo-arnica

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Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Senecio (sen-ek-ee-o ) (Info)
Species: pseudo-arnica

Synonym:Arnica maritima

Category:
Perennials

Height:
6-12 in. (15-30 cm)
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

Spacing:
18-24 in. (45-60 cm)

Hardiness:
USDA Zone 2a: to -45.5 C (-50 F)
USDA Zone 2b: to -42.7 C (-45 F)
USDA Zone 3a: to -39.9 C (-40 F)
USDA Zone 3b: to -37.2 C (-35 F)
USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:
Full Sun

Danger:
Unknown - Tell us

Bloom Color:
Bright Yellow

Bloom Time:
Mid Summer

Foliage:
Herbaceous
Silver/Gray
Velvet/Fuzzy-Textured
Shiny/Glossy-Textured

Other details:
May be a noxious weed or invasive
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings
Flowers are good for cutting

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing the rootball
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds

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to view:

By Todd_Boland
Thumbnail #1 of Senecio pseudo-arnica by Todd_Boland

By Todd_Boland
Thumbnail #2 of Senecio pseudo-arnica by Todd_Boland

By Todd_Boland
Thumbnail #3 of Senecio pseudo-arnica by Todd_Boland

Profile:

No positives
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorContent
Neutral Todd_Boland On Mar 12, 2005, Todd_Boland from St. John's, NL (Zone 5b) wrote:

This Newfoundland wildflower is a halophytic species, always growing in sandy to rocky gravels next to the sea. In North America it is found around the Gulf of St. Lawrence in Canada, Newfoundland, Labrdaor ro Greenland and it is also found along the Pacific from BC to Alaska. Plant height is variable from a little over 6" to over 4 feet.

The plant is beautiful. New emerging rosettes are covered in white, wooly hairs. Later, most of the hairs fall off, revealing deep green, shiny leaves. The flowers are quite large and produced in clusters. The flower arrangement is similar to that of Ligularia dentata. While beautiful and very showy, it is also very invasive in the right site. They also prefer salty soils. So it is best to enjoy them in the wilds.



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