Swiss chard: when to sow, plant out and harvest
Also called: Chard.
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 | 4 March – 24 March | 25 March – 21 April; 1 September – 21 September | 1 April – 21 April | 1 June – 30 November |
| Atlantic coast | 22 February – 14 March | 15 March – 11 April; 5 September – 25 September | 22 March – 11 April | 22 May – 4 December |
| Eastern France | 24 February – 16 March | 17 March – 13 April; 30 August – 19 September | 24 March – 13 April | 24 May – 28 November |
| Mediterranean | 21 January – 10 February | 11 February – 10 March; 21 September – 11 October | 18 February – 10 March | 20 April – 20 December |
| Mountains (around 1,000 m) | 29 March – 18 April | 19 April – 16 May; 31 July – 20 August | 26 April – 16 May | 26 June – 29 October |
Growing
- Family
- Amaranthaceae
- Latin name
- Beta vulgaris subsp. vulgaris (Cicla group)
- Cold tolerance
- Half-hardy (dislikes hard frost)
- Soil temperature to germinate
- 4 °C minimum
- Emergence
- 7–10 days
- Between rows
- 40–50 cm
- In the row
- 40 cm
- To harvest
- 60 days
Companion planting
The level of evidence is shown for each pairing: many rest on tradition rather than on studies.
Sources
- Aujardin.info — Le calendrier du potager (reference: Île-de-France)
- La Bonne Graine (seed company) — Le calendrier des semis et des plants
- 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
- Oregon State University Extension — Soil temperature conditions for vegetable seed germination (from the UC Davis/Harrington data)
- Tous au potager — Distance de plantation des légumes : tableau des espacements
- Gerbeaud — Les distances de plantation à respecter
- 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)