When to Plant Cabbage in Alberta
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 Alberta
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 23–July 3
⚠ 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.
Alberta Cities — Cabbage Planting Dates
City-specific frost dates and cabbage planting windows for Alberta.
Growing Cabbage in Alberta
- 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 Alberta 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 Alberta 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 Alberta?
In Alberta (Canadian Zones 3b–4a), 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 Alberta?
Alberta gardeners should prioritise varieties bred for shorter seasons or Canadian climates. For cabbage in Canadian Zones 3b–4a, 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 Alberta's climate affect cabbage?
Alberta spans Canadian Zones 3b–4a with frost-free seasons ranging from roughly 107 to 128 days. Cabbage actually prefer the cooler spring and fall windows typical of Alberta, making them one of the most reliable crops in the province.
Can I grow cabbage in containers in Alberta?
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 Alberta?
First fall frost dates in Alberta range from September 12 in the coldest areas to September 15 in the warmest. For a fall cabbage crop, count back from your local first-frost date and plant around June 23–July 3.