When to Plant Cabbage in Manitoba
Published: April 24, 2026 · Updated: April 27, 2026
Extremely cold-hardy brassica — survives temperatures as low as -7°C (20°F). Start indoors 6–8 weeks before last frost, transplant 2–4 weeks before last frost, and also plant for fall harvest.
Cabbage grow well in this province with appropriate variety selection and standard Canadian planting timing.
Cabbage Planting Window for Manitoba
Start seeds indoors: April 6–13 (varies by city — earliest in southern Ontario, latest on the Prairies)
Transplant outdoors: May 4–14 (after last frost in your city)
Minimum soil temperature: 7°C (45°F)
Days to harvest: 60–100 days
Sun requirement: Full sun (6+ hours)
Fall crop planting: June 30–July 10
⚠ Start cabbage indoors 6–8 weeks before last frost. Transplant 2–4 weeks before last frost. Very frost tolerant — withstands temperatures as low as 20°F. Also plant in late summer for fall harvest.
Manitoba Cities — Cabbage Planting Dates
City-specific frost dates and cabbage planting windows for Manitoba.
Growing Cabbage in Manitoba
- Space plants 18 inches apart — crowding reduces head size and promotes fungal disease.
- Side-dress with nitrogen 3–4 weeks after transplanting to support rapid leaf formation.
- Harvest when heads feel firm; leave the root ball in the ground and small secondary heads may form.
- Fall cabbage sweetens after light frost — one of the best-tasting garden crops when harvested in October.
Companion Planting for Cabbage
In Manitoba gardens, pair cabbage with Onion, Dill, Celery, Beet. Avoid planting near Tomato, Strawberry, Pepper, which compete with or inhibit cabbage growth.
Common Pests and Problems
Cabbage in Manitoba are commonly affected by Cabbage Worm, Cabbage Looper, Aphid, Flea Beetle. Floating row covers installed at planting block most adult pests from laying eggs, and a weekly scouting routine catches infestations before they damage the crop.
Frequently Asked Questions
When should I plant cabbage in Manitoba?
In Manitoba (Canadian Zone 3a), start seeds indoors around April 6 and transplant around May 4. Cabbage grow well in this province with appropriate variety selection and standard Canadian planting timing.
What is the best cabbage variety for Manitoba?
Manitoba gardeners should prioritise varieties bred for shorter seasons or Canadian climates. For cabbage in Canadian Zone 3a, look for cultivars labelled under 100 days to maturity. Local nurseries and provincial seed exchanges curate varieties that ripen within Canadian frost-free windows.
How does Manitoba's climate affect cabbage?
Manitoba spans Canadian Zone 3a with frost-free seasons ranging from roughly 120 to 120 days. Cabbage actually prefer the cooler spring and fall windows typical of Manitoba, making them one of the most reliable crops in the province.
Can I grow cabbage in containers in Manitoba?
Yes. Container growing on balconies and patios extends the viable growing area across every Canadian province. Dark-coloured containers warm up faster in spring and extend the season on both ends. Choose a 5-gallon or larger pot for cabbage and water daily during hot summer weather, since containers dry out quickly.
When is the first fall frost in Manitoba?
First fall frost dates in Manitoba range from September 22 in the coldest areas to September 22 in the warmest. For a fall cabbage crop, count back from your local first-frost date and plant around June 30–July 10.