Arnica montana is widespread across most of Europe. It is absent from the British Isles and the Italian and Balkan Peninsulas.
Arnica montana grows in nutrient-poor siliceous meadows up to nearly 3,000 metres. It is rare overall, but may be locally abundant. It is becoming rarer, particularly in the north of its distribution, largely due to increasingly intensive agriculture. In more upland regions, it may also be found on nutrient-poor moors and heaths.
Arnica montana has tall stems, 20–60 cm high, supporting usually a single flower head. Most of the leaves are in a basal rosette, but one or two pairs may be found on the stem and are, unusually for composites, opposite.
The flower heads are yellow, approximately 5 cm in diameter, and appear from May to August.
Arnica montana is sometimes grown in herb gardens and historically has been used as medicine. It has been used in herbal medicine for centuries.In addition to its medicinal uses Arnica montana are very attractive to bees and other insects, making them an ideal plant for people wishing to attract wildlife to their garden.
Info source: Wikipedia.org, gardenershq.com
Genus - Arnica
Species - Montana
Common name - Mountain Arnica
Pre-Treatment - Not-required
Plant type - Perennial Medicinal Herb
Vegetation type - Deciduous
Hardiness zones - 4 - 9
Exposure - Full Sun
Height - 1-2' / 0,30 - 0,60 m
Spread - 8" / 0,20 m
Growth rate - Medium
Bloom season - June - July
Leaf / Flower color - Green / Yellow
Soil PH - acid, neutral and basic (alkaline) soils and can grow in very acid (pH 5.80-7.60)
Soil type - Sandy, loamy, clay, prefers well-drained, grows in nutritionally poor soils
Water requirements - Average, high
Landscape uses - Sometimes grown in herb gardens and historically has been used as medicine
Seeds are usually take about a month to germinate, but can take as long as two years.
Lightly cover the seeds and sow in the late summer.
If starting plants indoors, sow in pots and germinate at a temperature of ~ +13C (55F).
Grow for one year before transplanting outdoors following the last frost.