Prefers a moderately fertile deep moisture-retentive well-drained loam and a position in semi-shade but also succeeds in a sunny position. Requires a sheltered position. Plants are hardier when grown on poorer soils. This species is especially tolerant of poor dry soils. Prefers an acid soil. Dormant plants are hardy to at least -15°c. The young growth in spring, even on mature plants, is frost-tender and so it is best to grow the plants in a position sheltered from the early morning sun. The whole plant has an unpleasant smell.
A tea is made from the roots. The roots are also used for making 'root beer'.
Seed - best sown as soon as ripe in a cold frame. Stored seed requires 3 - 5 months of cold stratification. Germination usually takes place within 1 - 4 months at 20°c. When large enough to handle, prick the seedlings out into individual pots and grow them on in light shade in a greenhouse for at least their first winter. Once the plants are 25cm or more tall, they can be planted out into their permanent positions, late spring or early summer being the best time to do this. Root cuttings 8cm long, December in a cold frame. Store the roots upside down in sand and pot up in March/April. High percentage. Division of suckers in late winter. Very easy, the suckers can be planted out direct into their permanent positions if required.
Rocky or sandy sterile soils, Alberta to Saskatchewan, Manitoba and Quebec.
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