Kohlrabi: when to sow, plant out and harvest
Sowing, planting and harvest dates for your climate, good and bad companions, growing tips.
When to sow in your region
Average dates, computed from the frost dates of each climate. For your exact dates, choose your town.
| Climate | Sow under cover | Sow outdoors | Plant out | Harvest |
|---|---|---|---|---|
| Northern France | 18 February – 10 March | 1 March – 30 June; 1 September – 21 September | 18 March – 7 April; 22 September – 12 October | 1 June – 31 October |
| Atlantic coast | 8 February – 28 February | 19 February – 20 June; 5 September – 25 September | 8 March – 28 March; 26 September – 16 October | 22 May – 4 November |
| Eastern France | 10 February – 2 March | 21 February – 22 June; 30 August – 19 September | 10 March – 30 March; 20 September – 10 October | 24 May – 29 October |
| Mediterranean | 7 January – 27 January | 18 January – 19 May; 21 September – 11 October | 4 February – 24 February; 12 October – 1 November | 20 April – 22 July; 15 August – 20 November |
| Mountains (around 1,000 m) | 15 March – 4 April | 26 March – 25 July; 31 July – 20 August | 12 April – 2 May; 21 August – 10 September | 26 June – 29 September |
Growing
- Family
- Brassicaceae
- Latin name
- Brassica oleracea var. gongylodes
- Cold tolerance
- Hardy (withstands frost)
- Emergence
- 3–10 days
- Between rows
- 30–40 cm
- In the row
- 20–30 cm
- To harvest
- 50–70 days
Companion planting
The level of evidence is shown for each pairing: many rest on tradition rather than on studies.
Good neighbours
No documented pairing.
Keep apart
No documented pairing.
Sources
- Gerbeaud — per-crop fiches: chou chinois, chou kale, chou-rave, rutabaga, patate douce, topinambour, gombo, haricot d'Espagne / haricots grimpants, pourpier, radis noir, chicorée/scarole, tomatillo, ail, échalote, ciboulette, ciboule, cerfeuil, sarriette
- The Old Farmer's Almanac — Planting Calendar (New York City, last frost Apr 3; cross-checked with Minneapolis, last frost Apr 30)
- Colorado State University Extension — Vegetable Planting Guide
- Tous au potager — Distance de plantation des légumes : tableau des espacements
- The Old Farmer's Almanac — Vegetable growing guides (garlic, shallots, onions, spinach, peas, lettuce, kale, radishes, carrots, beets, swiss chard, kohlrabi, bok choy, fennel, cabbage, mustard greens, rutabagas, rhubarb, mint, cilantro)
- University of Maryland Extension — When to Plant Vegetables (central Maryland calendar, first frost Oct 25)