When to plant pumpkin 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. Pumpkin in Toronto is doable with planning outdoors. 96 suitable days are enough for fast varieties (90 days) but not slow ones (120 days).

Pumpkin

How to grow Pumpkin Toronto climate Weekly temperatures and windows

Where are you growing?

Tight fit

Not realistic in greenhouse

Tight fit in a cold frame

Pumpkin in Toronto is doable with planning outdoors. 96 suitable days are enough for fast varieties (90 days) but not slow ones (120 days).

When to plantJune 3 – June 15

Harvest: September 1 – November 1
Season vs crop: 96 grow days vs 90–120 needed
Typical frost (last spring – first fall): April 20 – November 8

Pumpkin in Toronto is doable with planning outdoors. 96 suitable days are enough for fast varieties (90 days) but not slow ones (120 days).

Planting conditions

Direct sow
Grow outdoors
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 row96

Days to harvest90–120 days from seed

Jun 3 – Jun 15

Direct sow

Jun 16 – Aug 31

Grow outdoors

Sep 1 – Nov 1

Harvest

Activity	Window	Notes
Direct sow	Jun 3 – Jun 15	Plant outdoors in this window.
Grow outdoors	Jun 16 – Aug 31	Plants grow outdoors until harvest.
Harvest	Sep 1 – Nov 1	Expected harvest from typical days to harvest.

Direct sow
Grow outdoors
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 (21 – 35 °C70 – 95 °F21 – 35 °C (70 – 95 °F)) and tolerable (16 – 38 °C61 – 100 °F16 – 38 °C (61 – 100 °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 dateJune 3

Direct sow windowJune 3 – June 15

Suitable growing windowJune 3 – September 6 (96 days)

Expected harvestSeptember 1 – November 1

How these dates are judged

Ideal conditions: Daytime air from 21 – 35 °C70 – 95 °F21 – 35 °C (70 – 95 °F).
Suitable conditions: Daytime air from 16 – 38 °C61 – 100 °F16 – 38 °C (61 – 100 °F).
Last frost and first frost: Typical spring and fall frost dates for Toronto, shown in the key dates.
Days to harvest: 90–120 days from seed, 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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