Manitoba Planting Calendar 2026
Manitoba's Red River Valley black soil is among Canada's most fertile. The growing season runs 100-125 frost-free days, with Winnipeg gardeners traditionally planting after the May long weekend. Warm summers and long days produce excellent yields.
Zones 1a-3b • Reference city: Winnipeg (last frost: May 25)
Frost Dates in Manitoba
Average last spring frost and first fall frost dates for Manitoba cities. Your planting calendar depends on these dates.
| City | Last Spring Frost | First Fall Frost | Frost-Free Days | Zone |
|---|---|---|---|---|
| Winnipeg | May 25 | Sep 22 | 120 | 3b |
| Brandon | May 27 | Sep 14 | 110 | 3a |
| Portage La Prairie | May 24 | Sep 23 | 122 | 3b |
Month-by-Month Planting Schedule
Planting dates based on Winnipeg's frost dates. Select your city above for more precise timing.
April
| Vegetable | Start Indoors | Plant Outdoors | Harvest By | Frost Tolerance |
|---|---|---|---|---|
| Peas | Direct sow | Apr 20 | Jun 19 | Hardy |
| Spinach | Direct sow | Apr 20 | May 30 | Hardy |
| Radishes | Direct sow | Apr 20 | May 15 | Hardy |
May
| Vegetable | Start Indoors | Plant Outdoors | Harvest By | Frost Tolerance |
|---|---|---|---|---|
| Lettuce | Apr 20 | May 4 | Jun 18 | Semi-Hardy |
| Carrots | Direct sow | May 8 | Jul 17 | Semi-Hardy |
| Kale | Apr 20 | May 4 | Jun 28 | Hardy |
| Broccoli | Apr 13 | May 11 | Jul 15 | Semi-Hardy |
| Onions | Mar 9 | May 4 | Aug 12 | Hardy |
| Potatoes | Direct sow | May 4 | Aug 2 | Semi-Hardy |
| Beets | Apr 24 | May 8 | Jul 2 | Semi-Hardy |
June
| Vegetable | Start Indoors | Plant Outdoors | Harvest By | Frost Tolerance |
|---|---|---|---|---|
| Tomatoes | Apr 6 | Jun 5 | Aug 19 | Very Tender |
| Peppers | Mar 23 | Jun 8 | Aug 17 | Very Tender |
| Beans | Direct sow | Jun 5 | Jul 30 | Tender |
| Cucumbers | May 1 | Jun 5 | Jul 30 | Very Tender |
| Zucchini | May 1 | Jun 5 | Jul 25 | Tender |
Complete Planting Dates for Manitoba
All 15 vegetables with indoor start, outdoor planting, and estimated harvest dates for Manitoba.
| Vegetable | Start Indoors | Plant Outdoors | Harvest By | Frost Tolerance |
|---|---|---|---|---|
| Tomatoes | Apr 6 | Jun 5 | Aug 19 | Very Tender |
| Peppers | Mar 23 | Jun 8 | Aug 17 | Very Tender |
| Lettuce | Apr 20 | May 4 | Jun 18 | Semi-Hardy |
| Peas | Direct sow | Apr 20 | Jun 19 | Hardy |
| Beans | Direct sow | Jun 5 | Jul 30 | Tender |
| Carrots | Direct sow | May 8 | Jul 17 | Semi-Hardy |
| Cucumbers | May 1 | Jun 5 | Jul 30 | Very Tender |
| Zucchini | May 1 | Jun 5 | Jul 25 | Tender |
| Kale | Apr 20 | May 4 | Jun 28 | Hardy |
| Broccoli | Apr 13 | May 11 | Jul 15 | Semi-Hardy |
| Spinach | Direct sow | Apr 20 | May 30 | Hardy |
| Radishes | Direct sow | Apr 20 | May 15 | Hardy |
| Onions | Mar 9 | May 4 | Aug 12 | Hardy |
| Potatoes | Direct sow | May 4 | Aug 2 | Semi-Hardy |
| Beets | Apr 24 | May 8 | Jul 2 | Semi-Hardy |
Manitoba Gardening Tips by Month
- ✓March: Start peppers and onions indoors under grow lights.
- ✓April: Start tomatoes, broccoli, and herbs indoors. Test and amend soil.
- ✓May: Direct-sow hardy crops (peas, spinach, radishes) early. Transplant warm crops after May long weekend.
- ✓June: Plant beans, corn, cucumbers, and squash. Succession-sow lettuce.
- ✓July: Peak growing season. Harvest peas and early lettuce. Watch for storms.
- ✓August: Main harvest month. Sow spinach and lettuce for fall.
- ✓September: Harvest before first frost (mid to late September). Plant garlic.
Plan your Manitoba garden
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City Planting Calendars in Manitoba
Detailed planting calendars for Manitoba cities with exact dates based on local frost data.
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Frequently Asked Questions
When should I start planting in Manitoba?
Planting dates in Manitoba vary by location (zones 1a-3b). Check the frost dates table above for your nearest city, then use our calculator for exact dates.
What is the last frost date in Manitoba?
Last frost dates in Manitoba range from early April to late May depending on your city. See the frost dates table above for specific dates.
What vegetables grow best in Manitoba?
Hardy crops like peas, kale, spinach, and potatoes grow well across Manitoba. In zone 1a-3b, tomatoes, peppers, beans, and cucumbers also do well with proper timing. Use our free calculator for exact planting dates.
When should I start seeds indoors in Manitoba?
Start peppers and onions 9-11 weeks before your last frost date, tomatoes 7 weeks before, and brassicas 5-6 weeks before. In Manitoba with a last frost around May 25, that means starting peppers in March and tomatoes in April.
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