What hardiness zone is Montreal?

Montreal is in Canadian Hardiness Zone 5. Moderate – many shrubs, roses, most vegetables

When is the last frost in Montreal?

The average last frost date in Montreal is Late April (Apr 20–30). Always watch local forecasts as it varies year to year.

What vegetables grow best in Montreal?

Zone 5 gardens in Montreal do well with cold-hardy brassicas, root vegetables, and many perennials. With a short frost-free period of around 155 days, choose varieties with days-to-maturity suited to your zone.

Gardening in Montreal, Quebec | GardeningKnowHow.ca

Gardening in Quebec

Quebec gardeners embrace the challenge of Zone 3–5 conditions, developing a distinct horticultural tradition celebrating cold-hardy varieties, native plants, and the intense joy of short-season harvests. Montreal's urban heat island pushes it close to Zone 5.

Gardening in Calgary

Video

Woman tending a flower garden in Calgary — Tending the flower beds

Woman picking flowers with the Calgary skyline behind her — Picking flowers, city skyline

Woman harvesting vegetables in a Calgary rooftop garden — Rooftop harvest

Planting Calendar – September 2026

Montreal

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Growing season Shoulder This month

Task	Details
Start Indoors	Garlic planting begins (plant before freeze)
Direct Sow	Winter crops in cold frame (Zone 5+)
Key Tasks	Collect & dry seeds; compost healthy tops

Frost Dates – Montreal

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Last Spring Frost

Late April (Apr 20–30)

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First Fall Frost

Mid October (Oct 10–20)

Frost-free period: Approximately 155 days. Always check Environment Canada's local forecast — frost dates can vary by 2–3 weeks depending on microclimates, elevation, and annual weather patterns.