Last Frost Date Pickering — April 22 (Zone 6b)
Last frost date Pickering: April 22 for the central core (Zone 6b). Lakeshore neighbourhoods (Bay Ridges, Frenchman's Bay) benefit from Lake Ontario moderation; north Pickering (Seaton, Claremont) runs 5–10 days later toward the Oak Ridges Moraine.
Last frost date Pickering 2026: April 22 (Zone 6b). Bay Ridges, Frenchman's Bay (lakeshore): April 18–21. Amberlea, Liverpool (central): April 21–25. Seaton, Claremont (rural north): April 27–May 5. Wait until May 1–10 to transplant tomatoes (mid-May north). Source: Environment and Climate Change Canada (1991–2020).
Pickering Neighbourhoods
| Area | Last Frost |
|---|---|
| Bay Ridges (lakeshore south) | April 18–21 |
| Frenchman's Bay, West Shore, Rosebank | April 18–23 |
| Liverpool (south-central) | April 21–24 |
| Amberlea (central) | April 22–25 |
| Brock Ridge, Dunbarton, Highbush | April 23–27 |
| Seaton (new north development) | April 27–May 2 |
| Greenwood, Claremont, Whitevale (rural north) | April 30–May 8 |
Pickering can drop to -3°C in late April, colder in the rural north. A 2.4×9m frost blanket protects an entire raised bed.
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Frequently Asked Questions
What is the last frost date in Pickering?
Pickering's last spring frost date is April 22 for the central core — Zone 6b. This is the historical 50th-percentile average from Environment and Climate Change Canada climate normals (1991–2020). Lakeshore neighbourhoods (Bay Ridges, Frenchman's Bay, Waterfront Trail area) run 3–4 days earlier (April 18–21) thanks to Lake Ontario moderation. North Pickering (Seaton, Claremont, Greenwood, the rural agricultural belt) runs 5–10 days later (April 27–May 5) because of greater distance from Lake Ontario and higher elevation toward the Oak Ridges Moraine. The full historical range spans April 10 (earliest) to May 12 (latest).
When can I plant tomatoes in Pickering?
Wait until May 1–10 to transplant tomatoes, peppers, basil, beans, and squash in Pickering's lakeshore and central neighbourhoods. North Pickering (Seaton, Claremont, rural agricultural belt) should wait until May 7–17. Cool-season crops can be direct sown from late March. Victoria Day weekend (third Monday of May) is the GTA's traditional safe-transplant deadline. Pickering's growing season is approximately 190 days on the lakeshore, dropping to about 170 days in the rural north toward the Oak Ridges Moraine.
What is the last frost date in Bay Ridges, Amberlea, Liverpool, and Seaton?
Pickering neighbourhoods vary by distance from Lake Ontario. Bay Ridges (lakeshore south): April 18–21. Frenchman's Bay area: April 18–21. Liverpool (south-central): April 21–24. Amberlea (central): April 22–25. West Shore, Rosebank: April 20–23. Brock Ridge, Dunbarton: April 23–26. Highbush, Rougemount: April 23–27. Seaton (new north development): April 27–May 2. Greenwood, Claremont (rural north): April 30–May 5. Whitevale, rural agricultural belt: May 1–8.
What growing zone is Pickering?
Pickering is officially Zone 6b for the central and southern parts under the Canadian Plant Hardiness Zone system. Lakeshore neighbourhoods sit in the warmer end of Zone 6b. North Pickering (Seaton, Claremont, rural belt) drops to the cooler end of Zone 6b approaching Zone 6a toward the Oak Ridges Moraine. A Zone 6 plant overwinters reliably anywhere in Pickering; Zone 7 plants survive most years in lakeshore spots but die in severe polar-vortex winters. Pickering shares its climate profile with neighbouring Ajax and the rest of Durham Region's lakeshore communities.
How do I protect plants from late frost in Pickering?
Late frost in Pickering can drop to -3°C in worst cases, with north Pickering rural areas occasionally hitting -4°C. Floating row cover (Reemay, Agribon) over transplants protects to about -3°C and is the GTA standard. Cloches or inverted pots over individual seedlings. Heavy mulch around transplants. Plant tender crops in the warmest spot — south-facing fence, lakeshore-side garden, against a heat-radiating brick wall. Don't transplant tender crops if nights below 3°C are forecast through May 10 (mid-May for north Pickering). Available at Sheridan Nurseries Pickering, Plant World Pickering, Home Depot, Canadian Tire.
How does Pickering's last frost compare to other Durham Region cities?
Pickering's April 22 last frost matches neighbouring Ajax and is similar to other Durham Region lakeshore cities. Compared to GTA cities: 2 days later than Toronto and Mississauga (April 20), same as Ajax (April 22), 1 day earlier than Hamilton (April 23), 4 days earlier than Vaughan (April 26), 6 days earlier than Markham and Brampton (April 28). Pickering has wider internal variation than most GTA cities because it stretches from the warm Lake Ontario shoreline all the way north to the Oak Ridges Moraine agricultural belt — a 10–14 day spread between Bay Ridges and Claremont.
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