Skip to content
IIIFolio · plant profile№ 4C6Cedible
Data provenancePermapeopleTreflePFAFPOWOreviewed 13 Oct 2026methodology → read
Home/Plants/Brassicaceae

Roadside bittercress

Cardamine debilisfam. Brassicaceae
Educational content — not medical, botanical, or professional advice. Plant identification, safety, and edibility depend on local conditions, cultivars, and correct identification. Consult a qualified botanist or forager before consuming or handling wild specimens. How we source & review →
edibleperennialedibleedible leafherbperennial
Updated·Quick Q&A →
Garden journal pausedUse profile notes below
Cardamine debilis (Roadside bittercress) — botanical photograph
Pl. 4C6C — Cardamine debilis
Cardamine debilisCardamine debilisCardamine debilisCardamine debilisCardamine debilisCardamine debilisCardamine debilisCardamine debilisCardamine debilisCardamine debilisCardamine debilisCardamine debilisCardamine debilisCardamine debilis
I

Overview

Roadside bittercress, scientifically known as Cardamine debilis and belonging to the Brassicaceae family, is a perennial herb commonly found in New Zealand's North and South Islands. This plant thrives in moist environments with light or partial sun exposure and can be grown in various soil types, including sandy, medium, and clay soils. Known for its edible leaves, roadside bittercress adds a distinctive touch to landscapes while providing a culinary ingredient. Its ability to grow up to 0.3 meters tall makes it an attractive addition to gardens and natural settings. The leaves of roadside bittercress are particularly useful; they can be consumed fresh in salads or cooked as a green vegetable. While the flowers may not be as desirable, focusing on the tender leaves ensures the best results for culinary use. This plant has been introduced into the Dominican Republic and Haiti, expanding its presence beyond New Zealand. Roadside bittercress is hardy in temperate regions and thrives in moist conditions with partial sun to full shade. Its versatility in soil types makes it adaptable to different growing environments, contributing to its widespread cultivation. While not traditionally used for medicinal purposes, the edible nature of its leaves provides a practical benefit for gardeners and chefs alike.

Quick answers

What is Roadside bittercress?

Roadside bittercress, scientifically known as Cardamine debilis and belonging to the Brassicaceae family, is a perennial herb commonly found in New Zealand's North and South Islands.

Compare with:Arabis serrata→Cardamine glacialis→Cardamine nasturtioides→all comparisons →
Growingconditions · propagation · uses
V

Cultivation

Roadside bittercress thrives in full sun to partial shade and prefers moist soil that is light (sandy), medium, or heavy (clay). This perennial grows up to 0.3 meters tall and can be propagated by seed or division. It is hardy in temperate regions and is native to New Zealand North and South. The edible parts are the leaves, making it a useful addition to gardens for their culinary value.
Light
Full sun, Partial sun/shade
Water
Moist
Soil
Light (sandy), Medium, Heavy (clay)
Life cycle
Perennial
Habit
Forb/herb
Mature size
0.3 m tall
For first-time growers

How to grow Roadside bittercress for the first time

8steps

Roadside bittercress is a simple perennial to grow for beginners, focusing on basic care and harvesting.

  1. 1

    What you'll need

    Seeds or seedlings of Roadside bittercress, a small trowel, and a watering can.

  2. 2

    Best time to plant

    Plant in spring after the last frost or in autumn before the first freeze.

  3. 3

    Soil and container prep

    Choose a location with light to partial sun. Ensure the soil is well-draining, either in a garden bed or a pot.

  4. 4

    Sowing or transplanting

    Direct sow seeds 0.5 cm deep or transplant seedlings into prepared soil, spacing them about 15-20 cm apart.

  5. 5

    First two weeks

    Keep the soil consistently moist and provide light shade if direct sunlight is intense.

  6. 6

    Ongoing care

    Water when the top inch of soil feels dry. Mulch to retain moisture and suppress weeds.

  7. 7

    Harvest or pruning

    Prune back any yellowing leaves to encourage new growth, and harvest young leaves for use in salads.

  8. 8

    Common mistakes

    Overwatering, planting in full sun, neglecting to mulch, and not pruning regularly.

VI

Edible & utility

Edible parts:Leaves
Edible uses: The leaves of roadside bittercress are edible and can be consumed fresh in salads or cooked as a green vegetable. They thrive in moist conditions and partial sun to full shade. Skip the flowers and focus on the tender leaves for best results.
Contextrange · companions · related
VII

Distribution

2 native · 2 introduced
Distribution across1 continent· 2 native· 2 introduced
Americas2 regions
introduced (2)Dominican RepublicHaiti
Broader regions
native:New Zealand North, New Zealand South
IX

Specimen gallery

1 image
Cardamine debilis (Roadside bittercress) — botanical photograph
Roadside bittercress (Cardamine debilis)
X

See also

8 related
XI

Explore further

XII

About this entry

Last updated
Citation
How to cite this entry · Submit a correction
Back to the cataloguePlant id · 4c6c1896-091b-4ec4-a1c9-a2f8ffa140dd
❦❦❦❦
Endpaper · archive updates

Get archive updates

Occasional email when substantial new content lands — plant profiles, seasonal growing notes, folk-remedy additions. Free, no tracking, unsubscribe anytime.

Newsletter returning soon.
We are rebuilding the update list around a lightweight editorial workflow. New dispatches will resume after the next content review cycle.
iCare notes