Prairies Vegetable Gardening Guide

Calgary, Edmonton, Saskatoon and Winnipeg share a short frost-free season, about 110 to 121 days, warm summer days and dry air. Everything is about fitting crops inside that window.

Frost dates, temperatures and precipitation are Environment and Climate Change Canada climate normals (1981–2010). Growing advice is checked against provincial agriculture departments and Canadian universities.

Frost dates and climate

Average dates of the last spring frost and first fall frost, and the frost-free period between them, at major stations in the region. The growing season is that frost-free period; choose varieties that mature within it.

What grows well here, and what struggles

The first fall frost ends the season for most crops, so a crop’s days to maturity must fit before it. Starting seedlings indoors gives tomatoes, peppers and other long-season crops a head start; harden them off gradually and plant out frost-tender crops only after the danger of frost has passed. Floating row covers add some frost protection and extend the season.

Garlic is planted in the fall, before freeze-up, for a crop the next summer; root crops store best cold and moist, somewhere that does not freeze.

Month by month

What our month guides recommend for Prairies. Each month links to the full guide.

• January: start indoors now?: No source gives January sowing; count back from your frost date, other january work: Plan; microgreens; check storage
• February: start indoors: Count back from your frost date, outdoors: Nothing
• March: start indoors: Peppers by late March, at least 8 weeks before planting out, outdoors: Nothing
• April: indoors: Tomatoes by about mid-April; green-sprout seed potatoes, outdoors: Not yet: potatoes wait for soil at 10°C
• May: outdoors: Potatoes once soil is 10°C, indoors or waiting: Tomatoes and peppers out after May 24
• June: sow outdoors: Carrots and other successions, also: Hill potatoes; protect tender plants on cold nights
• July: sow or plant now: Fall crops by count-back from first frost, also: Remove garlic scapes; harvest garlic when ready
• August: sow or plant now: Garlic from late August, notes: At least three weeks before freeze-up
• September: sow or plant now: Garlic; ideally late August or early September, also: Harvest and store roots and squash
• October: garlic timing: Late August to early October in Saskatchewan; September to late October in Manitoba, with October 15 ideal most years, other october work: Mulch planted garlic; finish harvest before freeze-up
• November: sow or plant: Dormant-seed hardy vegetables just before freeze-up (late October or early November), main jobs: Mulch garlic and fall-sown beds; store the harvest
• December: outdoors: Nothing: keep mulch and snow cover on garlic and fall-sown beds, indoors and storage: Microgreens; check stored crops

Crop guides to start with

Guides for crops that appear in this region’s month-by-month plantings:

• Potatoes
• Carrots
• Peas
• Green beans
• Onions
• Garlic
• Cabbage
• Lettuce
• Beets
• Spinach
• Kale
• Tomatoes
• Zucchini
• Pumpkins
• Radishes

Weather and soil notes

These stations get only about 350–520 mm of precipitation a year, a third to a half of the BC coast, so watering matters in dry summers. Snowfall is about 90–130 cm a year.

Back to regional gardening in Canada, or see the Canada vegetable planting calendar.

References

• Environment and Climate Change Canada: Canadian Climate Normals 1981–2010 (frost dates, temperature, precipitation)
• Manitoba Agriculture: Agricultural climate of Manitoba
• University of Saskatchewan, Gardening at USask: Determining planting dates
• Dalhousie University Faculty of Agriculture, Extended Learning: Sowing seed (Garden Box series)
• Dalhousie University Faculty of Agriculture, Extended Learning: Vegetable gardening in the fall (Garden Box series)
• University of Saskatchewan, Gardening at USask: Growing your own transplants
• Manitoba Northern Healthy Foods Initiative: Starting seeds indoors
• Dalhousie University Faculty of Agriculture, Extended Learning: Managing the garden: season extension and frost protection
• Manitoba Indigenous and Northern Relations: A community gardener’s guidebook
• University of Saskatchewan, Gardening at USask: Row coverings in no-till gardening
• Ontario Ministry of Agriculture, Food and Agribusiness: Growing strawberries for home gardens
• University of Saskatchewan, Gardening at USask: Garlic
• Ontario Ministry of Agriculture, Food and Agribusiness: Garlic production
• Government of Saskatchewan: Garlic
• University of Saskatchewan, Gardening at USask: Cold storage of root crops, cole crops, winter squash, onions and garlic
• Manitoba Northern Healthy Foods Initiative: Cold storage options
• Government of Saskatchewan: Carrot production

Figures in the tables are the official averages named above. Every other statement is supported by at least three of these sources. The month-by-month notes summarise our own month guides, each of which lists its sources. All sources were checked on 24 October 2026.

Last reviewed: 24 October 2026