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When to plant tomatoes in the United Kingdom: 21 May – 11 August

Tomato in the United Kingdom: plant out into open ground from 21 May to 11 August; the window opens earliest in Portsmouth and closes latest in Swansea (40 cities).

Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

Planting window by climate zone

ZoneCitiesWindow
270 frost-free days or moreSwansea, Brighton, Plymouth, Portsmouth21 May – 11 August
210–269 frost-free daysLondon, Bristol, Leeds, Cardiff, Belfast, Liverpool, Sheffield, Newcastle upon Tyne, Leicester, Bradford, Coventry, Nottingham, Hull, Derby, Southampton, Aberdeen, Oxford, York, Cambridge, Norwich, Exeter, Derry, Wrexham, Lincoln (United Kingdom), Ipswich, Worcester23 May – 9 August
150–209 frost-free daysManchester, Edinburgh, Birmingham, Glasgow, Dundee, Inverness, Stirling, Perth (United Kingdom), Carlisle, Stoke-on-Trent25 May – 30 July

Tomato: the window in each city

CityWindowZone
Portsmouth21 May – 11 August270 frost-free days or more
Southampton23 May – 3 August210–269 frost-free days
Cambridge24 May – 4 August210–269 frost-free days
London24 May – 3 August210–269 frost-free days
Swansea24 May – 11 August270 frost-free days or more
Birmingham25 May – 30 July150–209 frost-free days
Ipswich25 May – 9 August210–269 frost-free days
Cardiff26 May – 2 August210–269 frost-free days
Liverpool26 May – 6 August210–269 frost-free days
Nottingham26 May – 3 August210–269 frost-free days
Oxford26 May – 3 August210–269 frost-free days
Leicester27 May – 30 July210–269 frost-free days
Lincoln (United Kingdom)27 May – 30 July210–269 frost-free days
Manchester27 May – 25 July150–209 frost-free days
Norwich27 May – 8 August210–269 frost-free days
Bristol28 May – 2 August210–269 frost-free days
Coventry28 May – 28 July210–269 frost-free days
Bradford29 May – 29 July210–269 frost-free days
Leeds29 May – 3 August210–269 frost-free days
Stoke-on-Trent31 May – 26 July150–209 frost-free days
Exeter1 June – 7 August210–269 frost-free days
Worcester1 June – 2 August210–269 frost-free days
Derby2 June – 2 August210–269 frost-free days
Hull2 June – 4 August210–269 frost-free days
York2 June – 25 July210–269 frost-free days
Edinburgh3 June – 20 July150–209 frost-free days
Glasgow3 June – 22 July150–209 frost-free days
Newcastle upon Tyne3 June – 31 July210–269 frost-free days
Sheffield4 June – 2 August210–269 frost-free days
Carlisle5 June – 26 July150–209 frost-free days
Wrexham5 June – 3 August210–269 frost-free days
Derry7 June – 1 August210–269 frost-free days
Inverness7 June – 24 July150–209 frost-free days
Perth (United Kingdom)13 June – 22 July150–209 frost-free days
Belfast15 June – 30 July210–269 frost-free days
Dundee16 June – 23 July150–209 frost-free days
Stirling17 June – 20 July150–209 frost-free days
Brighton18 June – 11 August270 frost-free days or more
Aberdeen20 June – 31 July210–269 frost-free days
Plymouth21 June – 11 August270 frost-free days or more