Lettuce: when to sow, plant out and harvest

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 November – 31 January	18 March – 7 April; 15 September – 5 October	18 March – 31 March; 18 August – 14 September	1 April – 30 November
Atlantic coast	8 February – 28 February; 5 November – 4 February	8 March – 28 March; 19 September – 9 October	8 March – 21 March; 22 August – 18 September	22 March – 4 December
Eastern France	10 February – 2 March; 30 October – 29 January	10 March – 30 March; 13 September – 3 October	10 March – 23 March; 16 August – 12 September	24 March – 28 November
Mediterranean	21 November – 20 February	4 February – 24 February; 5 October – 25 October	4 February – 17 February; 7 September – 4 October	18 February – 22 July; 15 August – 20 December
Mountains (around 1,000 m)	15 March – 4 April; 30 September – 30 December	12 April – 2 May; 14 August – 3 September	12 April – 25 April; 17 July – 13 August	26 April – 29 October

The level of evidence is shown for each pairing: many rest on tradition rather than on studies.