When to plant potato in Toronto

In Toronto, typical last spring frost is April 20 and typical first fall frost is November 8. Typical last spring frost: April 20. Potato in Toronto is a good fit outdoors. The suitable growing window of 188 days covers the 70–125 days this plant usually needs.

Potato

How to grow Potato Toronto climate Weekly temperatures and windows

Where are you growing?

Comfortable

Comfortable in greenhouse

Comfortable in a cold frame

Potato in Toronto is a good fit outdoors. The suitable growing window of 188 days covers the 70–125 days this plant usually needs.

When to plantApril 19 – July 17

Harvest: June 28 – November 21
Season vs crop: 188 grow days vs 70–125 needed
Typical frost (last spring – first fall): April 20 – November 8

Potato in Toronto is a good fit outdoors. The suitable growing window of 188 days covers the 70–125 days this plant usually needs.

Planting conditions

Direct sow
Harvest

Local activity windows for this place and growing method. Blue fill is usually too cold for this plant. Dashed lines are typical last and first frost.

Suitable growing days in a row188

Days to harvest70–125 days from planting

Apr 19 – Jul 17

Direct sow

Jun 28 – Nov 21

Harvest

Activity	Window	Notes
Direct sow	Apr 19 – Jul 17	Plant outdoors in this window.
Harvest	Jun 28 – Nov 21	Expected harvest from typical days to harvest.

Direct sow
Harvest

Blue fill is usually too cold for this plant. Dashed lines are typical last and first frost (35 seasons (1991–2025)). Adjust a week or two for your conditions.

Planting and growing across the year

Planting is the sow / plant-out window. Growing is daytime air versus this plant’s ideal (15 – 24 °C59 – 75 °F15 – 24 °C (59 – 75 °F)) and tolerable (7 – 30 °C45 – 86 °F7 – 30 °C (45 – 86 °F)) ranges.

Ideal / plantable
Tolerable
Too cold
Too hot
Outside window

Planting uses sow / plant-out rules; growing shows daytime air against this plant’s ideal and tolerable ranges.

Key dates

Typical last spring frostApril 20

Low-risk last spring frostApril 29

Typical first fall frostNovember 8

Low-risk first fall frostNovember 1

Frost-free days201

Outdoor sow dateApril 19

Direct sow windowApril 19 – July 17

Suitable growing windowApril 19 – October 23 (188 days)

Expected harvestJune 28 – November 21

How these dates are judged

Ideal conditions: Daytime air from 15 – 24 °C59 – 75 °F15 – 24 °C (59 – 75 °F).
Suitable conditions: Daytime air from 7 – 30 °C45 – 86 °F7 – 30 °C (45 – 86 °F).
Last frost and first frost: Typical spring and fall frost dates for Toronto, shown in the key dates.
Days to harvest: 70–125 days from planting, from typical days to harvest.
Sowing window: Dated sow and harvest bars use frost dates, soil minima, night limits, and last-sow count-back from typical crop timing. Air ratings on the weekly chart colour only weeks inside that same window — see weekly temperatures and windows.

Other plants for Toronto

Calculated by Plan & Plant. Method. Data 35 seasons (1991–2025).

Frost and suitability dates are typical figures from climate statistics.

Based on 35 years (1991–2025) of ERA5-Land data from Open-Meteo, for an area of about 10 km. Typical dates, not a guarantee.

Dates for Toronto use ERA5-Land cell 43.70, -79.40. How we calculated this · Algorithm 2026-10-season-12.

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