Lesser swinecress (Lepidium didymum)

Lesser swinecress

Lepidium didymum

Low-growing ground cover with tiny white blooms, carpet-like and resilient. Annual or short-lived perennial herb; common name: lesser swinecress.

Full sun
2–3/week
Beginner
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Plant Needs

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Sunlight Prefers full sun to partial shade; tolerates short periods of full shade without significant growth decline
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Watering Keep soil evenly moist but not waterlogged; drought-tolerant once established, with reduced watering needs in cool weather
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Temperature Hardy to light frosts (down to 0°C); thrives in temperate to warm growing conditions between 15–25°C
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Characteristics

  • Leaf: Small, oblong to spatulate leaves with shallowly toothed margins, arranged in basal rosettes and alternate on stems
  • Flower: Tiny white four-petaled flowers in terminal racemes, less than 2 mm across
  • Stem: Slender, branching, prostrate to ascending stems that root at nodes
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Care Guide

Watering

Keep soil consistently moist during active growth to support spread

Fertilization

Light monthly feeding with diluted, balanced nutrients. Minimal fertilization needed; excess nutrients can reduce compact ground cover form

Eggshell powder topdress:Crush clean, dried eggshells into fine powder; sprinkle lightly on soil surface to boost calcium levels and deter minor soil-borne pests
Pruning
  • Trim back overgrown patches to maintain a neat, compact ground cover form
  • Remove spent flower heads to prevent unwanted self-seeding in managed garden spaces
  • Thin dense growth to improve airflow and reduce potential for fungal growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No listed toxicity to cats

Humans: No documented toxic effects for humans; young leaves are edible in small quantities

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Garden Uses & Culture

Culture: N/A

Usage: Ground cover for rock gardens, container edges, or gaps in pathways; young leaves are edible in small salad portions