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When to plant cucumbers in Canada: 27 May – 6 October

Cucumber in Canada: plant out into open ground from 27 May to 6 October; the window opens earliest in Windsor and closes latest in Victoria (29 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 moreVictoria13 June – 6 October
210–269 frost-free daysVancouver22 June – 2 September
150–209 frost-free daysToronto, Montreal, Ottawa, Winnipeg, Edmonton, Quebec City, Halifax, Sherbrooke, Trois-Rivières, Saguenay, Hamilton, London (Canada), Gatineau, Kitchener, Windsor, Kelowna, St. John's, Thunder Bay, Moncton, Fredericton, Charlottetown27 May – 26 August
Short season: under 150 frost-free daysCalgary, Saskatoon, Regina, Whitehorse, Yellowknife, Iqaluit6 June – 31 July

Cucumber: the window in each city

CityWindowZone
Windsor27 May – 23 August150–209 frost-free days
London (Canada)29 May – 23 August150–209 frost-free days
Toronto29 May – 15 August150–209 frost-free days
Montreal30 May – 17 August150–209 frost-free days
Kitchener31 May – 11 August150–209 frost-free days
Trois-Rivières31 May – 14 August150–209 frost-free days
Hamilton1 June – 23 August150–209 frost-free days
Winnipeg1 June – 28 July150–209 frost-free days
Kelowna2 June – 16 August150–209 frost-free days
Regina6 June – 22 JulyShort season: under 150 frost-free days
Gatineau11 June – 17 August150–209 frost-free days
Ottawa11 June – 17 August150–209 frost-free days
Victoria13 June – 6 October270 frost-free days or more
Saskatoon15 June – 22 JulyShort season: under 150 frost-free days
Calgary18 June – 17 JulyShort season: under 150 frost-free days
Sherbrooke18 June – 12 August150–209 frost-free days
Quebec City21 June – 13 August150–209 frost-free days
Vancouver22 June – 2 September210–269 frost-free days
Iqaluit25 June – 31 JulyShort season: under 150 frost-free days
Moncton26 June – 20 August150–209 frost-free days
Charlottetown27 June – 18 August150–209 frost-free days
Edmonton27 June – 22 July150–209 frost-free days
Fredericton28 June – 13 August150–209 frost-free days
Yellowknife30 June – 20 JulyShort season: under 150 frost-free days
Saguenay2 July – 7 August150–209 frost-free days
Halifax3 July – 25 August150–209 frost-free days
Thunder Bay8 July – 8 August150–209 frost-free days
Whitehorse9 July – 14 JulyShort season: under 150 frost-free days
St. John's14 July – 26 August150–209 frost-free days