Pumpkin Growing Guide | Gardeningist

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) Source Source
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 Source SourceRecommended: 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 Source SourceRecommended: 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.

← Back to all plants