Sainfoin Milkvetch (Astragalus onobrychis)

Sainfoin Milkvetch

Astragalus onobrychis

It bears delicate pea-like blooms, a low-growing forage and ornamental legume. Common name: Sainfoin Milkvetch.

Full sun
1/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; thrives in dry, sunny meadow conditions
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Watering Water deeply but infrequently; drought-tolerant once established
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Temperature Hardy to cold winter temperatures; withstands mild summer heat without stress
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Characteristics

  • Leaf: Pinnately compound with small oval leaflets, gray-green foliage with smooth margins
  • Flower: Dense racemes of pink to purple pea-like blooms clustered at stem tips
  • Stem: Slender, branching green stems with fine, soft pubescence
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Care Guide

Watering

Keep soil slightly moist during active growth periods

Fertilization

Light application of balanced organic feed. As a legume, it fixes atmospheric nitrogen, reducing fertilizer needs

Eggshell powder topdressing:Crush dried eggshells into fine powder; sprinkle lightly over soil surface to add slow-release calcium without odor
Pruning
  • Deadhead spent blooms to encourage extended flowering through early summer
  • Trim back faded foliage in late autumn to tidy garden beds
  • Thin overcrowded stems in early spring to improve airflow and light penetration
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: No documented toxic effects for cats per ASPCA guidelines

Humans: No documented toxic effects for human consumption or contact

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Garden Uses & Culture

Culture: N/A

Usage: Forage for grazing livestock; ornamental wildflower in native meadow gardens