Large Bittercress (Cardamine amara)

Large Bittercress

Cardamine amara

Its delicate white blooms brighten damp woodlands, a quiet wild beauty. Perennial herbaceous wildflower; common name: Large Bittercress.

Partial sun
3–4/week
Beginner
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Plant Needs

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Sunlight Prefers dappled woodland shade or partial sun; avoids intense midday direct sun that may scorch foliage
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Watering Requires consistently moist soil; tolerates occasional shallow standing water in damp natural habitats
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Temperature Hardy to -15°C; thrives in cool temperate conditions; suffers leaf damage above 28°C
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Characteristics

  • Leaf: Pinnately compound leaves with rounded, slightly toothed leaflets; basal leaves form low rosettes
  • Flower: Clusters of small, four-petaled white cross-shaped blooms on upright stalks
  • Stem: Slender, smooth green stems that branch near the top of the plant
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Care Guide

Watering

Maintain consistent soil moisture; water when the top 1cm of soil feels dry

Fertilization

Light feed with diluted organic matter once every two months. Avoid over-fertilization to prevent excessive foliage growth at the expense of blooms

Composted banana peel tea:Fully compost banana peels first; dilute 1:20 with water for root drenching; avoid raw peels to prevent pest infestations
Pruning
  • Deadhead spent flower heads to encourage self-seeding and extend bloom period
  • Trim back yellowing foliage in late summer to maintain a tidy appearance
  • Thin overcrowded clumps in early spring to improve airflow and reduce disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats

Humans: No known toxic effects; young leaves are edible in small quantities

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Garden Uses & Culture

Culture: N/A

Usage: Wildflower for pollinator gardens; young leaves can be used in salads in small amounts