Winnipeg Planting Calendar 2026
Winnipeg (zone 3b) has 120 frost-free days with a late May last frost. The Red River Valley's rich black soil is among Canada's most fertile. Hot summers with long days produce excellent yields despite the short season.
Zone 3b • Last frost: May 25 • First fall frost: Sep 22 • 120 frost-free days
Month-by-Month Planting Schedule
When to plant 15 popular vegetables in Winnipeg (zone 3b), based on the average last frost date of May 25.
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 Winnipeg
All 15 vegetables with indoor start, outdoor planting, and estimated harvest dates for Winnipeg.
| 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 |
Winnipeg Gardening Tips by Month
- ✓March: Start peppers and onions indoors (10+ weeks before last frost).
- ✓April: Start tomatoes, brassicas, and herbs indoors. Prepare raised beds as snow melts.
- ✓May: Direct-sow peas, spinach, and radishes early. Transplant warm crops after May long weekend.
- ✓June: Plant beans, corn, cucumbers, and squash. Succession-sow lettuce.
- ✓July: Peak growing with 16+ hours of daylight. Harvest peas and early lettuce.
- ✓August: Main harvest month. Sow fall spinach and lettuce.
- ✓September: First frost around Sep 22. Harvest remaining crops; plant garlic.
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Frequently Asked Questions
When should I start planting in Winnipeg?
In Winnipeg (zone 3b), the average last frost date is May 25. Hardy crops like peas, spinach, and radishes can be planted 3-5 weeks before this date. Tender crops like tomatoes and peppers should wait until after the last frost.
What is the last frost date in Winnipeg?
The average last spring frost in Winnipeg is May 25, and the first fall frost is Sep 22, giving you approximately 120 frost-free growing days.
What vegetables grow best in Winnipeg?
Hardy crops like peas, kale, spinach, and potatoes grow well across Winnipeg. In zone 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 Winnipeg?
Start peppers and onions 9-11 weeks before your last frost date, tomatoes 7 weeks before, and brassicas 5-6 weeks before. In Winnipeg with a last frost around May 25, that means starting peppers in March and tomatoes in April.
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