Canada Milkvetch (Astragalus canadensis)

Canada Milkvetch

Astragalus canadensis

Astragalus canadensis, or Canada Milkvetch, is a perennial herb that grows 1 to 4 feet tall. It features pinnately compound leaves and produces densely packed spike-like clusters of pale yellow to creamy white flowers from June to August. This species thrives in prairies, woodland edges, and along shorelines, preferring rich, loamy soils. Canada Milkvetch is known to improve soil fertility through nitrogen fixation. In landscaping, it is appreciated for its ability to enhance soil health and its attractive flower clusters, making it suitable for prairie restorations and naturalized plantings.

Characteristics

Type	Forb
Sun	Full Sun, Partial Sun
Soil	Loam, Sand/Gravel, Calcareous
Moisture	Mesic
Average Max Height (inches)	50
Suggested Plant Spacing (inches)	30
Bloom month(s)	June, July, August
Bloom Color or Type	Varies
Dominance	High

Range Maps

Sowing Information

Sow seed onto a firm, weed-free seedbed. Hand-broadcast seed making two perpendicular passes for even coverage. If planting a mix, broadcast the grass component first and lightly rake/drag it into the top 1/8–1/4" of soil. Next, broadcast wildflower/forb seed and press it into the soil surface (with a roller/cultipacker or the back of a rake) to ensure good seed-to-soil contact. After seeding, apply a very light layer of clean, seed-free straw (or other weed-free, site-appropriate mulch) to reduce erosion and retain moisture without smothering seedlings. A good rainfall or thorough watering will help settle seed and mulch and improve germination.

Planting Information

Dig a hole in your planting site slightly larger than the plant’s root system. When placing the plant into the hole, ensure that the soil line remains consistent with its original level in the pot. Fill in around the roots with the excavated soil, gently firming it to eliminate air pockets. Water the plant thoroughly the same day to promote successful establishment.