When to Plant Cabbage in Charlottetown, PE
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.
Charlottetown's Canadian Zone 6a (USDA 5b) Island Maritime climate has cool springs, warm humid summers, and moderate falls. Surrounded by the Gulf of St. Lawrence which moderates temperature extremes. 172 frost-free days and sandy loam soil create ideal conditions for root vegetables.
Cabbage Planting Calendar for Charlottetown
Start seeds indoors: March 13–20
Transplant outdoors: April 10–20
Harvest window: June 9 – July 19
Minimum soil temperature: 7°C (45°F)
Days to harvest: 60–100 days
Sun requirement: Full sun (6+ hours)
Fall crop planting: July 28–August 7 (harvest September 26)
⚠ 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.
Charlottetown Climate Notes
PEI is Canada's potato capital — growing potatoes here connects to the island's agricultural identity. Island cool maritime summers are ideal for root vegetables. Sandy loam soil drains well and warms faster than mainland clay soils, giving PEI gardens a head start in spring that partially offsets the cool summers.
Growing Tips for Cabbage
- 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 in Charlottetown
Pair cabbage with Onion, Dill, Celery, Beet for mutual benefit. Avoid planting near Tomato, Strawberry, Pepper, which compete with or inhibit cabbage growth.
Pests and Problems to Watch in Charlottetown
The most common pest and disease pressure on cabbage in Charlottetown comes from Cabbage Worm, Cabbage Looper, Aphid, Flea Beetle. Floating row covers through the first 4–6 weeks after planting block adult pests from laying eggs, and a weekly scouting routine catches infestations before they damage the crop.
Frequently Asked Questions
When do I plant cabbage in Charlottetown?
Charlottetown's last spring frost is around May 1. Start seeds indoors March 13–20. Transplant outdoors April 10–20.
What Canadian hardiness zone is Charlottetown?
Charlottetown is in Canadian Zone 6a (USDA equivalent 5b). The Island Maritime climate delivers 172 frost-free days from May 1 to October 20, which shapes every planting date in the local calendar.
How long is Charlottetown's growing season?
Charlottetown has 172 frost-free days — from May 1 in spring to October 20 in fall. That is more than enough time to finish a full cabbage crop (60–100 days to maturity) before the first fall frost.
Can I grow cabbage in containers in Charlottetown?
Yes. Container growing on balconies and decks is practical in Charlottetown — choose a 5-gallon or larger dark-coloured container to warm the root zone, use a high-quality potting mix, and water daily during hot summer weather. In milder climates, containers extend both spring and fall windows by several weeks.
What is the first fall frost in Charlottetown?
Charlottetown's average first fall frost is October 20. For a fall cabbage crop, plant around July 28–August 7 so plants mature before the first killing frost.