Wood Bitter-vetch (Vicia orobus)

Wood Bitter-vetch

Vicia orobus

Its delicate pea-like blooms add soft charm to grassy banks. Perennial herbaceous legume; common name: wood bitter-vetch.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Prefers partial sun to full sun; tolerates light shade in warm summer climates to prevent leaf scorch
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Watering Water deeply when the top 2 cm of soil feels dry; avoid waterlogging to prevent root rot
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Temperature Hardy to -15°C for cool temperate winters; avoid prolonged exposure to temperatures above 28°C
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Characteristics

  • Leaf: Pinnate compound leaves with 6–12 pairs of oval leaflets, ending in a branched tendril
  • Flower: Clusters of 2–6 pale purple to pink pea-like blooms with subtle white markings
  • Stem: Slender, angular green stems covered in fine, soft hairs
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Care Guide

Watering

Keep soil consistently moist during active growth periods

Fertilization

Apply diluted balanced liquid feed once monthly. Avoid over-fertilization to prevent excessive foliage growth at the expense of blooms

Eggshell powder topdressing:Crush dried eggshells into fine powder; sprinkle 1 teaspoon per plant around the base and water lightly to release calcium into the soil
Pruning
  • Deadhead spent flower clusters to prevent unwanted self-seeding if desired
  • Trim back dead or yellowing foliage in late autumn to maintain a tidy growth habit
  • Thin overcrowded stems in early spring to improve airflow and reduce disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: No reported toxicity to cats per ASPCA guidelines

Humans: Ingestion of large quantities of raw seeds may cause mild gastrointestinal upset due to low-level lectin content

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Garden Uses & Culture

Culture: N/A

Usage: Wildflower garden component; nitrogen-fixing legume that improves soil fertility for surrounding plants