When to plant pumpkin in Columbus

In Columbus, typical last spring frost is April 12 and typical first fall frost is November 3. Typical last spring frost: April 12. Pumpkin in Columbus is doable with planning outdoors. 115 suitable days are enough for fast varieties (90 days) but not slow ones (120 days).

Pumpkin

How to grow Pumpkin Columbus climate Weekly temperatures and windows

Where are you growing?

Tight fit

Tight fit in greenhouse

Comfortable in a cold frame

Pumpkin in Columbus is doable with planning outdoors. 115 suitable days are enough for fast varieties (90 days) but not slow ones (120 days).

When to plantMay 18 – June 9

Harvest: August 16 – October 26
Season vs crop: 115 grow days vs 90–120 needed
Typical frost (last spring – first fall): April 12 – November 3

Pumpkin in Columbus is doable with planning outdoors. 115 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 row115

Days to harvest90–120 days from seed

May 18 – Jun 9

Direct sow

Jun 10 – Aug 15

Grow outdoors

Aug 16 – Oct 26

Harvest

Activity	Window	Notes
Direct sow	May 18 – Jun 9	Plant outdoors in this window.
Grow outdoors	Jun 10 – Aug 15	Plants grow outdoors until harvest.
Harvest	Aug 16 – Oct 26	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 12

Low-risk last spring frostApril 25

Typical first fall frostNovember 3

Low-risk first fall frostOctober 26

Frost-free days204

Outdoor sow dateMay 18

Direct sow windowMay 18 – June 9

Suitable growing windowMay 18 – September 9 (115 days)

Expected harvestAugust 16 – October 26

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 Columbus, 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 Columbus

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 Columbus use ERA5-Land cell 40.00, -83.00. How we calculated this · Algorithm 2026-10-season-10.

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