Description
Brightness: full sun
Harvest: 100 – 120 days
Average weight: 8 – 20 kilos
A spectacular storage pumpkin, the famous long-lived hubbard pumpkin arrived in marblehead, a coastal town in essex county, masschusetts in 1845, in the prisons of a west indian ship.
The seeds of the large green pumpkin originated in south america were shared with the local seed jh gregory. Experienced grower, Gregory has provided thousands and thousands of selections with the blue peel for this incredible pumpkin and has dedicated his career to marketing extraordinary fruits. Gregory credited Miss Hubbard as the person who originally gave him the seeds, he noted that she told him it was the best tasting pumpkin ever tasted.
Pumpkin with exquisite flavor, hard but relatively thin skin with bluish color, can be stored for up to 6 months, with simply delicious orange pulp. Depending on when it is harvested, the colossal blue hubbard pumpkin can weigh between 8 and 20 kilos.
This variety is usually used in the preparation of casseroles, soups, delicious pies or just cooked and sautéed with garlic in butter.
Germination Guide
🌍 Subtropical areas of South America, Argentina-Bolivia-Uruguay
Easy
Cucurbita maxima is a warm-season annual vine native to subtropical South America, cultivated worldwide for its diverse winter squash varieties including Hubbard, butternut, acorn, and turban types. Seeds germinate readily without special pre-treatment, requiring warm soil temperatures and consistent moisture to achieve rapid and uniform emergence within 7-14 days. This species is highly valued for both culinary and ornamental purposes, producing fruits that can range from small specialty varieties to giants exceeding 100 pounds.
Germination
Germination time
Expect germination in
7 – 14 days
Temperature
Min 20°C
Ideal 25°C
Max 30°C
Light
🌑 Darkness required
Substrate moisture
💧 Medium
Seed Pre-treatment
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💧
Soaking — 10 hours
Soak seeds in room-temperature water for 8 to 12 hours to speed up germination. Avoid soaking for too long, as this may lead to seed rot.
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📋
Additional notes
Cucurbita maxima seeds generally germinate readily and do not require special pre-treatment.
Substrate & Container
Recommended substrate
Peat moss or coco coir mixed with perlite (60/40 ratio), or general-purpose seed-starting mix
Recommended container
Individual pots or seed trays, preferably biodegradable pots to minimize root disturbance
Growing Tips
Ensure soil temperature reaches at least 70°F (21°C) for reliable germination; optimal range is 70-85°F (21-29°C). Place seeds on their side and cover with substrate, gently firming the surface. A propagation cover is optional but helpful for moisture retention; open every 2-3 days to check moisture and prevent fungal issues. Keep soil consistently moist but never waterlogged. Once seedlings emerge, provide strong light immediately to prevent legginess, reduce humidity gradually, and ensure good air circulation. Avoid disturbing roots during transplanting—cucurbits are sensitive to root disturbance. For indoor starting, sow 3-4 weeks before last frost date. Harden off seedlings gradually before transplanting outdoors after all frost danger has passed.
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