Last Frost Date Ajax — April 22 (Zone 6b)
Last frost date Ajax: April 22 for the central core (Zone 6b). Lakeshore neighbourhoods benefit from Lake Ontario moderation; north Ajax (Salem, Audley) runs slightly later.
Last frost date Ajax 2026: April 22 (Zone 6b). Lakeshore: April 18–21. Pickering Village, Westney Heights (central): April 20–25. Salem, Audley (north): April 25–30. Wait until May 1–10 to transplant tomatoes. Source: Environment and Climate Change Canada (1991–2020).
Ajax Neighbourhoods
| Area | Last Frost |
|---|---|
| Lakeshore Ajax (Waterfront Trail, Bayly south) | April 18–21 |
| Pickering Beach Road area | April 18–21 |
| Pickering Village (south-central historic) | April 20–23 |
| Westney Heights (central) | April 22–25 |
| Central Ajax / Bayly Street central | April 22–25 |
| Salem (north) | April 25–28 |
| Audley, Carruthers Creek upper (northeast) | April 25–30 |
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Frost Blanket / Row Cover
Ajax can drop to -3°C in late April. A 2.4×9m frost blanket protects an entire raised bed.
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