Wild Cabbage (Brassica oleracea)

Wild Cabbage

Brassica oleracea

Crunchy, nutrient-dense foliage bridges wild and cultivated tables. Herbaceous biennial; common names: wild cabbage, garden cabbage group.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; tolerates cool, overcast conditions for leafy growth
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Watering Keep soil evenly moist; avoid waterlogging to prevent root rot in heavy clay soils
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Temperature Hardy to mild frosts; optimal growth occurs at 10–20°C
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Characteristics

  • Leaf: Thick, waxy blue-green to dark green rosette leaves; variable shape across cultivated cultivars
  • Flower: Clusters of small, four-petaled pale yellow flowers on tall upright stalks
  • Stem: Fleshy central rosette stem; branching flower stalks develop in the second year
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Care Guide

Watering

Keep soil consistently moist; apply mulch to retain moisture and suppress weeds

Fertilization

Apply balanced liquid fertilizer every 2 weeks. Use nitrogen-rich fertilizer to promote lush leaf growth in the first growing season

Eggshell powder topdress:Sprinkle finely crushed, dried eggshells around the base of plants to boost soil calcium and prevent blossom end rot; avoid direct contact with young leaves
Pruning
  • Remove outer yellowing leaves to improve airflow and reduce pest habitat
  • Pinch emerging flower stalks in the first year to encourage larger, denser leaf rosettes
  • Trim damaged or diseased foliage regularly to maintain plant health
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed non-toxic; safe for cats to nibble in small amounts

Humans: Edible and non-toxic; widely cultivated as a nutrient-rich vegetable

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Garden Uses & Culture

Culture: Cultivated for over 2,000 years; a staple of European and global cuisines

Usage: Edible leafy vegetable; ornamental cultivars used for garden border color