• Close-up of an Arnica sororia (Twin Arnica) flower, showcasing bright yellow petals and a textured central disk. The delicate ruffled florets add intricate detail to the daisy-like bloom.
  • A mature Arnica sororia (Twin Arnica) plant in a cultivated garden, featuring numerous bright yellow flowers on upright stems. The plant is surrounded by mulch, with green foliage providing a striking contrast to the vibrant blooms.
  • A cluster of Arnica sororia (Twin Arnica) plants growing in a wild meadow, with bright yellow flowers emerging among tall grasses and other native vegetation. The plants' upright growth and narrow green leaves blend seamlessly into the natural landscape.
  • A compact clump of Twin Arnica (Arnica sororia) is shown blooming in a mulched garden bed. Numerous bright yellow, daisy-like flowers rise on short, leafy stems above a dense base of grayish-green, slightly fuzzy leaves. The cheerful blooms are evenly spaced and held upright, giving the plant a tidy, rounded appearance.
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Wild About Flowers

Arnica sororia - Twin Arnica

Arnica sororia - Twin Arnica

$6.75 CAD
$6.75 CAD
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Twin Arnica is a hardy, rhizomatous perennial with bright yellow, daisy-like flowers that bloom from late spring into early summer. Growing in loose clumps, its cheerful blooms rise above soft green foliage, drawing in bees, butterflies, and other pollinators seeking nectar. Its natural charm makes it a welcome addition to wildflower meadows, woodland edges, and mixed plantings.

Twin Arnica prefers well-drained sandy, rocky, or loamy soils and spreads gradually through underground rhizomes. Its steady growth makes it a reliable choice for both urban and rural landscapes looking to support pollinators. While the foliage is not a preferred food source, some browsing may occur in areas with high deer pressure; however, it typically recovers well due to its rhizomatous growth.

How Easy Is This Plant to Grow?

Germination Difficulty: Intermediate
Growing Difficulty: Intermediate
Speed of Growth: Moderate
Age to First Bloom: 2-3

Plant Sizes & Blooming Window

Important Information - The "Plant Sizes" are provided as a general guideline for plant selection. The "Blooming Window" indicates the general period when the species is in bloom, not how long an individual plant will flower.

Plant growth and bloom times will vary depending on geographical location & individual site conditions. Please scroll down to see the specific information for this plant.

Edible & Medicinal Info Disclaimer

The Edible & Medicinal information on this site is for informational purposes only and should not be acted on without thorough research and professional guidance. We are not responsible for any adverse effects resulting from the use of or misidentification of plants.

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Plant Specifics

Seeds Per Pack

Seeds Per Package: 20

Light Conditions

  • Sun
  • Part Shade

Soil Conditions

  • Sandy
  • Loam
  • Well Drained
  • Clay

Height

  • Under 12"
  • 12" - 24"

Width

  • Under 12"
  • 12" - 24"
  • Spreading

Bloom Colour

  • Yellow

Month of Bloom

  • May
  • June
  • July

Vigorousness

  • Moderate
  • Slow

Deer Resistance

  • Moderate

Features

  • Butterflies
  • Bees
  • Urban Spaces
  • Rural Spaces
  • Medicinal Properties
  • Toxic or Posionous Parts

Chinook Exposure

  • Fully Exposed

Distribution Info

Native to western Canada, Twin Arnica is found from BC, to MB, and down the Rocky Mountains into the US. Found in montane forests, meadows, sagebrush steppe, and open slopes, it is well adapted to semi-arid environments and often grows in association with grasses and shrubs.

Traditional Edible & Medicinal Info

Arnica species have been traditionally valued for their medicinal properties, their leaves and flowers contain anti-inflammatory compounds used in salves and poultices to treat bruises, sprains, and sore muscles.

⚠️ Toxicity Note: Arnica species should only be used externally, as internal use can be toxic and may cause serious side effects.