Yellow Serradella (Ornithopus compressus)

Yellow Serradella

Ornithopus compressus

It carpets grasslands with tiny yellow blooms, a quiet pollinator haven. Annual herbaceous forage plant; common name: yellow serradella.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; thrives in open, sunny grassland conditions and tolerates mild heat
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Watering Water deeply during prolonged dry spells; drought-tolerant once established with well-drained soil
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Temperature Thrives in cool temperate to warm Mediterranean climates; tolerates light frost down to 5°C
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Characteristics

  • Leaf: Pinnately compound with small oval leaflets arranged in pairs along thin, hairy stems
  • Flower: Clusters of tiny bright yellow pea-like blooms, 3–5 mm in diameter
  • Stem: Slender, prostrate or ascending stems covered in fine, soft hairs
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Care Guide

Watering

Keep soil slightly moist during active growth periods

Fertilization

No regular fertilization required; tolerates low-nutrient soils. Benefits from natural nitrogen fixation via root nodules

Eggshell powder topdressing:Sprinkle finely crushed, dried eggshells on the soil surface to boost calcium levels; avoid overapplication to prevent soil alkalinity
Pruning
  • Remove spent flower heads to prevent unwanted self-seeding in managed areas
  • Trim back dead foliage after flowering to tidy planting beds
  • Thin dense patches to improve airflow and reduce risk of fungal growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No reported toxicity to cats

Humans: No documented toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Forage crop for livestock; pollinator support in wildflower meadows