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Boreal sweetvetch (Hedysarum boreale), also called northern hedysarum, is a perennial plant in the legume family that typically grows up to 80 cm tall. It forms dense clumps of upright stems bearing numerous small, medium-green leaves arranged alternately along the stem. In summer, it is covered with clusters of pinkish-purple to deep purple flowers that are highly nectar-producing and attract bees and other pollinators. After flowering, it produces small, flat, segmented pods. Boreal sweetvetch naturally grows in dry prairies, rocky slopes, and gravelly or sandy soils across the temperate regions of Canada and the western United States. Once established, it is drought tolerant and thrives in sunny environments.
Ecological roles
Boreal sweetvetch plays an important role in dry and open ecosystems. Its deep roots help stabilize the soil and prevent erosion, while its flowers are a key resource for wild bees and bumblebees. Thanks to its ability to fix atmospheric nitrogen, it improves soil fertility and supports the regeneration of other native plants. It is often used in ecological restoration projects to re-establish vegetation cover in prairies and disturbed areas.
Akène cannot assume any responsibility for the use of plants for therapeutic purposes. Always seek advice from a professional before using a medicinal or edible plant.
Sowing and Growing
Technical Details
Seeds per packet:
Family: Fabaceae
Scientific name: Hedysarum boreale
Life cycle: Perennial
Hardiness zone: 4
Soil type: Sandy to clayey
Soil moisture level: Dry to humid
Soil - additional attributes: Well-drained. Prefers loamy soils.
Light: Sun, part shade
Blooming: May to June (Saskatchewan)
Spacing: 60 cm
Height: 20 to 80 cm
Deer resistance: Weak
Stratification: No
Scarification: Soak in hot water for 24 hours
Germination time: 6 to 30 days
Sowing depth: 4 to 6 mm