What hardiness zone is London?

London is in Canadian Hardiness Zone 6. Warm temperate – broad palette, fruit trees

When is the last frost in London?

The average last frost date in London is Mid April (Apr 10–20). Always watch local forecasts as it varies year to year.

What vegetables grow best in London?

Zone 6 gardens in London do well with cold-hardy brassicas, root vegetables, and many perennials. With a short frost-free period of around 170 days, choose varieties with days-to-maturity suited to your zone.

Gardening in London, Ontario | GardeningKnowHow.ca

Gardening in Ontario

Ontario's diverse geography spans Zone 3 in the north to Zone 7 in the Niagara Peninsula. Southern Ontario's Great Lakes moderate temperatures, extending seasons and enabling wine grapes, tender perennials, and a remarkable breadth of food crops.

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 – June 2026

London

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Growing season Shoulder This month

Task	Details
Start Indoors	Succession sow lettuce every 2 weeks
Direct Sow	All warm-season crops now safe Zone 3+
Key Tasks	Mulch beds; set up drip irrigation

Frost Dates – London

🌸

Last Spring Frost

Mid April (Apr 10–20)

🍂

First Fall Frost

Late October (Oct 20–31)

Frost-free period: Approximately 170 days. Always check Environment Canada's local forecast — frost dates can vary by 2–3 weeks depending on microclimates, elevation, and annual weather patterns.