When to plant garlic in Canada: 4 August – end of December

Garlic in Canada: plant from 4 August to the end of December; the window opens earliest in Iqaluit and closes latest in Vancouver (29 cities).

From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).

Planting window by climate zone

Zone	Cities	Window
270 frost-free days or more	Victoria	21 November – end of December
210–269 frost-free days	Vancouver	18 October – end of December
150–209 frost-free days	Toronto, 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, Charlottetown	6 September – 10 December
Short season: under 150 frost-free days	Calgary, Saskatoon, Regina, Whitehorse, Yellowknife, Iqaluit	4 August – 26 October

Garlic: the window in each city

City	Window	Zone
Iqaluit	4 August – 15 September	Short season: under 150 frost-free days
Whitehorse	29 August – 7 October	Short season: under 150 frost-free days
Calgary	1 September – 26 October	Short season: under 150 frost-free days
Yellowknife	4 September – 4 October	Short season: under 150 frost-free days
Edmonton	6 September – 19 October	150–209 frost-free days
Regina	6 September – 22 October	Short season: under 150 frost-free days
Saskatoon	6 September – 19 October	Short season: under 150 frost-free days
Winnipeg	12 September – 26 October	150–209 frost-free days
Saguenay	22 September – 30 October	150–209 frost-free days
Thunder Bay	23 September – 30 October	150–209 frost-free days
Kitchener	26 September – 21 November	150–209 frost-free days
Sherbrooke	27 September – 8 November	150–209 frost-free days
Fredericton	28 September – 11 November	150–209 frost-free days
Quebec City	28 September – 4 November	150–209 frost-free days
Trois-Rivières	29 September – 8 November	150–209 frost-free days
Toronto	30 September – 25 November	150–209 frost-free days
Kelowna	1 October – 27 November	150–209 frost-free days
Gatineau	2 October – 10 November	150–209 frost-free days
Montreal	2 October – 13 November	150–209 frost-free days
Ottawa	2 October – 10 November	150–209 frost-free days
Charlottetown	3 October – 20 November	150–209 frost-free days
Moncton	5 October – 17 November	150–209 frost-free days
Hamilton	8 October – 10 December	150–209 frost-free days
London (Canada)	8 October – 28 November	150–209 frost-free days
Windsor	8 October – 6 December	150–209 frost-free days
Halifax	10 October – 1 December	150–209 frost-free days
St. John's	11 October – 1 December	150–209 frost-free days
Vancouver	18 October – end of December	210–269 frost-free days
Victoria	21 November – end of December	270 frost-free days or more