Siim at et.wikipedia · CC BY-SA 2.5
Sea kale
Plant·Crambe maritima
Full sun
Sun
Medium
Water
Well-drained soil
Drainage
Zones 4–9
Hardiness
Sea kale (Crambe maritima) is a plant. It grows best in full sun and has moderate water needs.
Through the year
DormantLeafing outFloweringFruitingDying back
Works well with
from wiki dataNo companions recorded.
WHAT IT NEEDS
Wants full sun
Needs moderate water
Needs well-drained soil
Prefers soil pH 6.5–7.5
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Prefers sandy, loamy soil
Tolerates compacted soil well
Draws up potassium, calcium from deep in the soil
Adds a moderate amount of organic matter to the soil
WHAT IT GIVES
Gives mulch biomass (medium)
Provides potassium
Provides calcium
Attracts pollinators
HOW IT GROWS
SIZE & SPACING
Herbaceous
Height60–75 cm
Spacing90 cm (min 60 cm)
Root depthDeep
Width60–90 cm
Width figures are rough estimates, the most variable measurement in our data.
AI estimate · accuracy improves as growers contribute corrections.
HOW TO PROPAGATE
Propagate by seed, root cuttings
Difficulty
Establishes in about 2 yr
Self-seeds a little on its own
Where this comes from
Parsed11 Sept 2026
ConfidenceNot recorded
Photograph Siim at et.wikipedia · CC BY-SA 2.5