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Kohlrabi illustration

Vegetables · Biennial

Kohlrabi

Brassica oleracea (Gongylodes Group)

A rounded, swollen stem sits above the soil beneath a crown of blue-green leaves.

Make it part of your growing collection.

A LITTLE EVERYDAY CARE

Help it thrive.

A few things worth knowing.

01

Keep growth steady

Water through dry spells; drought and temperature extremes can trigger flowering.

02

Protect young leaves

Use insect mesh or inspect leaves for cabbage caterpillars and eggs.

03

Harvest while tender

Pick swollen stems while small; oversized stems can become woody, especially in hot, dry conditions.

Care guide · RHSSource checked 20 Sept 2026 · Adapt timing to your climate and variety.

A PLACE TO THRIVE

Growing essentials.

Sunlight: 6+ hours of sunSource-backed
Moisture: Consistently moistSource interpretation
Soil pH: Not verifiedExcluded from score
Drainage: Not verifiedExcluded from score
Nutrients: Not verifiedExcluded from score
Soil texture: sand / claySource-backed
Plant spacing: ≈ 25 cmPlanning estimate
Growing depth: ≈ 30 cmPlanning estimate
Typical height: ≈ 45 cmPlanning estimate
Growing season: cool-seasonPlanning estimate

Source-backed preferences and planning estimates are labelled separately. Missing values are not treated as a match. Spacing and depth still depend on cultivar and growing method.

Data sources & uncertainty

Sunlight

Full sun is preferred; 6+ hours is a category, not an upper tolerance limit.

Source · checked 2026-09-20

Moisture

Avoid drying out during growth; the moist-soil category represents a cropping preference.

Source · checked 2026-09-20

Soil pH

No precise preferred numeric interval verified; the unused placeholder is excluded from display and scoring.

Source · checked 2026-09-20

Drainage

No sufficiently specific drainage requirement verified; excluded from scoring.

Source · checked 2026-09-20

Nutrients

No comparable numeric nutrient requirement verified; excluded from scoring.

Source · checked 2026-09-20

Soil texture

Listed textures are examples, not an exhaustive tolerance list.

Source · checked 2026-09-20

Plant spacing

RHS gives 15 cm in rows 30 cm apart. The model uses a 25 cm square allowance instead of a row layout.

Source · checked 2026-09-20

Growing depth

30 cm follows the RHS minimum container depth, not a measured root limit.

Source · checked 2026-09-20

Typical height

Approximate planning height; cultivar, pruning and growth stage change the result.

Source · checked 2026-09-20

Growing season

Broad growth category, not a local planting calendar; excluded from scoring.

Source · checked 2026-09-20