How to Grow Cabbage in Canada: Zone-by-Zone Guide

Cabbage is one of the most productive crops you can grow in a Canadian vegetable garden. It's cold-tolerant, stores for months, and actually tastes better after a light frost. Every Canadian zone can grow excellent cabbage — the key is timing your indoor start and transplant correctly, and planting a second crop for fall harvest.

This guide covers the full process: when to start seeds, how to transplant, what varieties work in your zone, and how to keep cabbages healthy through to harvest.

---

When to Start Cabbage Seeds Indoors

Cabbage is started indoors 6–8 weeks before your last frost date, then transplanted outdoors 2–4 weeks before the last frost. This makes cabbage one of the earliest brassicas to go into the garden each spring.

Spring Planting Schedule by Zone

Use the frost date calculator at mygardenplanner.ca to find your exact last frost date and count back from there.

---

Hardening Off and Transplanting

Cabbage transplants need hardening off before going outside — young plants are less frost-tolerant than mature ones, even though cabbage is generally cold-hardy.

Hardening off steps:

1. Begin 10–14 days before your target transplant date
2. Start with 2 hours of outdoor exposure in a sheltered, shaded spot
3. Increase outdoor time by 1–2 hours each day
4. By day 10, seedlings can handle full sun and temperatures down to -2°C overnight

Transplanting:

• Space cabbage 45–60 cm (18–24 inches) apart for large heads; 30 cm (12 inches) for small varieties
• Plant on a cloudy day or in the evening to reduce transplant stress
• Water well immediately after transplanting

Cabbage tolerates light frost after hardening — a brief frost often improves head flavour.

---

Fall Cabbage: A Second Season

One of the best features of cabbage for Canadian gardeners is the fall crop. Start seeds indoors in late June or direct-sow outdoors in early-to-mid July for a September–October harvest.

Fall Planting Schedule by Zone

Fall-harvested cabbage is often superior to spring cabbage — cool temperatures slow the plant's growth and concentrate flavour. Heads left in the garden through light frost are fine; repeated hard freezes (-5°C or lower) will damage the outer leaves.

---

Best Cabbage Varieties for Canadian Gardens

Choose varieties matched to your season length:

For short seasons (zones 3–4):

• Earliana — 60 days to maturity, small tight heads, reliable in short seasons
• Pixie — 52 days, mini cabbage ideal for small gardens and tight spacing

For zones 5–6:

• Golden Acre — 65 days, classic round green head, dependable producer
• Tendersweet — 62 days, thin-leafed and sweet, excellent for fresh eating
• 평 Mammoth Red Rock — 90 days, red variety with exceptional storage quality

For zones 7–8 (longer seasons):

• January King — 170 days, extremely winter-hardy, can overwinter in zone 8
• Savoy Perfection — 85 days, crinkled leaves, excellent flavour, tolerates light frost well

---

Soil, Water, and Fertility

Soil: Cabbage is a heavy feeder. Work in compost or well-rotted manure before planting. Target pH 6.5–7.0 — slightly alkaline soil also suppresses clubroot, a common brassica disease.

Water: Cabbage needs consistent moisture — 2.5 cm (1 inch) per week. Inconsistent watering causes heads to split as they expand rapidly after a dry spell. Mulch around plants to retain soil moisture.

Fertility: Side-dress with a nitrogen fertilizer (compost tea or balanced granular fertilizer) when heads begin to form, about 4–6 weeks after transplanting.

---

Common Cabbage Problems

Clubroot

Swollen, distorted roots that cause wilting are the signature of clubroot, a soil-borne pathogen. Prevent by maintaining soil pH above 6.8, rotating brassica crops to a new bed each year, and purchasing transplants from reputable sources.

Cabbage Worms

The imported cabbageworm (pale green caterpillar) is the most damaging cabbage pest across Canada. Apply Bt (Bacillus thuringiensis var. kurstaki) or cover plants with insect-proof row covers immediately after transplanting.

Splitting Heads

Caused by inconsistent watering or leaving heads in the ground too long after maturity. Harvest promptly when heads feel firm and dense.

Tip Burn (Brown Leaf Edges)

Calcium deficiency triggered by rapid growth or drought stress. Maintain consistent watering and avoid excessive nitrogen.

---

Harvesting Cabbage

Heads are ready when they feel firm and dense when squeezed — usually 60–120 days from transplanting depending on the variety. Don't wait for the outer leaves to look perfect; once a head is firm, harvest it.

Cut the stem at the base with a sharp knife. Leave the root and a few leaves in place — many varieties will produce small secondary heads (side shoots) after the main head is cut.

---

Storing Cabbage

Cabbage is an exceptional storage crop:

• Refrigerator: Unwashed, in a plastic bag, whole heads keep 3–4 weeks
• Root cellar: At 0°C and high humidity, cabbage keeps 3–5 months
• Frozen: Blanch wedges 90 seconds, cool, freeze in portions (texture softens — best for cooked dishes)

Heads with outer leaves left on store longer. Don't remove outer leaves until you're ready to use.

---

Plan Your Cabbage Season at MyGardenPlanner.ca

Cabbage works best as part of a planned rotation — it should not follow another brassica (broccoli, kale, Brussels sprouts) in the same bed for at least 3 years. The free planting calculator at mygardenplanner.ca handles crop family tracking and gives you zone-specific seed-start and transplant dates automatically.

For a full multi-bed season plan that includes brassica rotation, fall crop scheduling, and succession timing, upgrade to a Home Gardener plan ($5/mo).

Get your cabbage planting dates →