Cucurbita maxima

Pumpkin

A practical guide to growing pumpkin in the home garden.

Growing profiles

Choose how this crop will be grown. Dimensions, spacing and timing belong to the selected profile—not to the species as a single universal value.

Trailing pumpkin / winter squash

Long-vined Cucurbita maxima form requiring substantial ground area.

Biological height
30–60 cm (12–24 in) Source
Mature canopy
150–400 cm (59–157 in) × 300–800 cm (118–315 in) SourceSource
Plant spacing
90–150 cm (35–59 in) Source
Row spacing
150–240 cm (59–94 in) Source
Layout
single row · open ground Source
Support
Usually unnecessary
Best germination temperature
27 °C (81 °F) Source

Climate-relative calendar

Planning estimates become local dates after the gardener supplies frost dates and current conditions. Harvest and crop-removal dates are estimates: actual crop condition takes priority.

Plant Pumpkin / winter squash7 days after last spring frost to 28 days after last spring frost SourceSourceRecommended: Soil temperature at least 10 °C (50 °F) for 3 consecutive days. Source
Begin harvesting Pumpkin / winter squash90 days after sowing to 120 days after sowing Source
Finish harvesting Pumpkin / winter squash14 days after first harvest to 30 days after first harvest
Remove Pumpkin / winter squash cropthe expected end of harvest to 7 days after the expected end of harvest

Compact pumpkin / winter squash

Bush or short-vined Cucurbita maxima form for constrained spaces.

Biological height
45–90 cm (18–35 in) Source
Mature canopy
90–240 cm (35–94 in) Source
Plant spacing
60–120 cm (24–47 in) Source
Row spacing
120–180 cm (47–71 in) Source
Layout
single row · open ground Source
Support
Usually unnecessary
Container
At least 76 L (20.1 US gal) · 1 plant Source
Best germination temperature
27 °C (81 °F) Source

Climate-relative calendar

Planning estimates become local dates after the gardener supplies frost dates and current conditions. Harvest and crop-removal dates are estimates: actual crop condition takes priority.

Plant Pumpkin / winter squash7 days after last spring frost to 28 days after last spring frost SourceSourceRecommended: Soil temperature at least 10 °C (50 °F) for 3 consecutive days. Source
Begin harvesting Pumpkin / winter squash80 days after sowing to 110 days after sowing Source
Finish harvesting Pumpkin / winter squash14 days after first harvest to 30 days after first harvest
Remove Pumpkin / winter squash cropthe expected end of harvest to 7 days after the expected end of harvest

Agronomy release agronomy-2026-07-11-r1 · reviewed 2026-07-11 by Gardeningist agronomic research synthesis. Each fact links to its supporting source.

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