Spearleaf arnica (Arnica longifolia)

Spearleaf arnica

Arnica longifolia is a rhizomatous plant forming large bunching patches of groundcover in moist, cool areas. The foliage is rough, mint-green, and sometimes sticky with glandular secretions. The stems are erect and bear daisylike flower heads with deep yellow ray florets and yellow to reddish or orange disc florets. The fruit is a reddish achene with a small pappus.

Scientific classification

Species

Spearleaf arnica (Arnica longifolia)

Asters bellflowers fanflowers and allies

Instantly identify plants with a snap

Snap a photo for instant plant ID, gaining quick insights on disease prevention, treatment, toxicity, care, uses, and symbolism, etc.

Download the App for Free

Perennial

Lifespan

Herb

Plant Type

Summer

Growth Season

Moderate

Growth Rate

Images of Spearleaf arnica

Attributes of Spearleaf arnica

Growth Rate

During Summer, spearleaf arnica demonstrates moderate growth rate. This pace allows for steady leaf production and height increase, marked by visible enhancements in size. While the plant may present slower or faster growth in other seasons, the moderate pace in Summer ensures well-balanced development. Its resilience during this season indicates a botanical adaptability to sustain heat.

Care Guide for Spearleaf arnica

Every week

Water

Full sun

Sunlight

Water: Spearleaf arnica thrives in mountain meadows with weekly watering to mimic natural hydration cycles. It prefers consistent moisture, avoiding waterlogging, and exhibits moderate drought tolerance. Outdoors, it benefits from evapotranspiration during peak seasons, highlighting the importance of soil moisture for its health.

Fertilize: Spearleaf arnica thrives with balanced nutrition fertilizers during growing seasons (spring to summer), monthly applications recommended, reducing frequency in winter. Follow label guidelines to prevent over-fertilization. Watering spearleaf arnica post-fertilization enhances nutrient absorption.

Pruning: Spearleaf arnica is a perennial featuring long, spear-like leaves and bright yellow flowers. Prune dead foliage in early spring and cut back post-bloom to encourage healthy growth and prevent self-seeding. Clean tools to minimize infection risk, promoting vigorous blooms and a tidy appearance.

Propagation: Spearleaf arnica is a perennial herb with vibrant yellow flowers and lance-shaped leaves, thriving in well-drained soils under full to partial sunlight. Propagate via healthy cuttings, using rooting hormone, and ensure consistent watering and partial shade to support robust establishment.

Get tips and tricks for your plants.

Keep your plants happy and healthy with our guide to watering, lighting, feeding and more.

Download the App for Free