This amazing plant is hardy to all temperate zones but thrives at high elevation in the temperate north. Arnica provides the basis for many homeopathic remedies, oil infusions, compresses, and salves. Press seeds into spongy potting soil and keep evenly moist and cool until germination. This light dependent germinator will often take a couple of weeks to sprout. Work up in pots before transplanting to acidic soil in full sun leaving at least two feet between the plants.