Halifax Planting Calendar 2026 — Zone 6b Frost Dates and Seed Starting Guide

Halifax is one of Canada's warmest gardening climates east of British Columbia. Sitting in hardiness zone 6b, the city sees its last average spring frost around April 15–20 and its first fall frost in late October to early November. That is roughly 190 frost-free days — a long and forgiving season that allows a wide range of crops, from early spring greens to late-season squash and even fall garlic.

Find your precise last frost date by postal code using the MyGardenPlanner frost date calculator.

Halifax Frost Dates 2026

Frost data based on Agriculture Canada climate normals for Halifax/Dartmouth.

Halifax's marine influence moderates temperature swings — winters are milder than inland Nova Scotia, and spring arrives earlier than in much of Atlantic Canada. Gardeners in Dartmouth, Sackville, or Bedford share a similar calendar; those further from the harbour (Musquodoboit, Sheet Harbour) may see frost a week later in spring and earlier in fall.

Halifax Seed Starting Calendar (Indoors)

With a last frost date of approximately April 20, Halifax gardeners can start seeds significantly earlier than most of Canada:

Tomatoes in Zone 6b

Halifax gardeners have the luxury of growing most tomato varieties available in Canada. The longer season opens the door to mid- and full-season varieties:

• Brandywine (80+ days) — performs reliably in Halifax's warm summers
• Sungold (57 days) — cherry tomato that produces prolifically
• Celebrity (70 days) — disease-resistant and widely available
• San Marzano (78 days) — paste tomato, excellent for canning

The main risk for tomatoes in Halifax is late blight (Phytophthora infestans), which thrives in Atlantic Canada's cool, wet conditions. Choose blight-resistant varieties where possible and stake for good air circulation.

Direct Seeding Outdoors

Month-by-Month Halifax Garden Calendar

January–February

• Start onions, leeks, celery indoors in late January
• Start peppers and eggplant in mid-February
• Order seeds — Atlantic Canada suppliers include Hope Seeds (Dartmouth) and Vesey's (PEI)

March

• Start tomatoes and brassicas (broccoli, cabbage, kale) indoors early March
• Begin hardening off brassicas for outdoor transplanting in April
• Direct sow peas outdoors in late March if soil is workable
• Direct sow spinach and lettuce from late March

April

• Early April: transplant frost-tolerant brassicas (broccoli, kale, cabbage) outdoors
• Mid-April: direct sow carrots, beets, and Swiss chard
• After April 20: transplant tomatoes, peppers, and cucumbers if weather is settled
• Start cucumbers and squash indoors if not already started

May

• All tender crops can be transplanted safely after May 1
• Direct sow beans, corn, and squash
• Begin succession planting of lettuce every 2 weeks

June–July

• Side-dress heavy feeders (tomatoes, squash, corn) with compost or balanced fertilizer
• Watch for aphids on brassicas, slugs in wet weather, and late blight on tomatoes
• Succession plant fall brassicas from seed in mid-July for fall harvest

August–September

• Plant garlic in late September–October for harvest next July
• Direct sow fall spinach, arugula, and radishes in late August for October harvest
• Begin harvesting summer squash, beans, and corn

October–November

• Use row covers to extend lettuce, kale, and spinach into November
• First frost risk arrives in late October — protect tender crops
• Clean beds and add compost for winter

Season Extension in Zone 6b

Halifax's mild climate makes season extension particularly rewarding:

Cold frames and cloches:

• Allow direct seeding outdoors 4–6 weeks earlier — late February for spinach
• Extend fall harvests of greens into December in a basic cold frame

Low tunnels (row cover over hoops):

• Provide 4–6°C of protection; useful for early tomato transplants in April
• Excellent for overwintering spinach and mâche through Nova Scotia's mild winters

Fall planting:

• Halifax's long autumn is ideal for a second season of lettuce, spinach, kale, and radishes
• Direct sow in late July–August for harvest from September through first hard frost

Best Crops for Halifax Gardens

Zone 6b stars:

• Kale — grows almost year-round in Halifax with light protection; a true staple
• Butternut squash — the long season allows full ripening of 100-day varieties
• Beans — bush beans produce abundantly in two or three successions
• Garlic — hardneck varieties thrive in Atlantic Canada's winters; harvest in July
• Asparagus — a long-term investment that yields for 20+ years in Halifax's mild winters
• Sweet corn — excellent in Halifax; plant in blocks of at least 16 plants for good pollination

Worth trying:

• Sweet potatoes — risky in Canada generally, but Halifax's zone 6b provides a reasonable chance with black plastic mulch
• Figs — can be overwintered with mulch protection in Halifax; zone 6b is near the northern limit

Plan Your Halifax Garden Season

Halifax has one of the most generous growing windows in Atlantic Canada. Enter your postal code at MyGardenPlanner.ca to confirm your exact last frost date, then use the season planner to generate a personalized seed starting and transplant calendar for every crop you want to grow.

The window between last frost and first frost is yours to fill — plan it well.