How to Grow Red Hubbard Squash
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Red Hubbard Squash
Cucurbita maxima
vegetableRed Hubbard is a winter squash variety prized for its deep orange flesh, nutty flavor, and exceptional storage capability. The plant produces large, warty fruits with a dark red-orange exterior and can yield 2-4 squashes per plant. This heirloom variety is a staple for fall and winter cooking, offering excellent nutritional value and long shelf life.
When should you plant Red Hubbard Squash in your zone?
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Example Red Hubbard Squash timeline · Pittsburgh, PA (Zone 6b)
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Plant Red Hubbard Squash
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Red Hubbard Squash
Around Jul 26≈ 100 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Red Hubbard Squash dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; best production in zones 5-7
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Seedling
2-3 weeksCotyledons emerge within 5-10 days. First true leaves appear heart-shaped and slightly fuzzy.
Keep soil warm (70-80°F), maintain consistent moisture, thin to strongest seedling per hill once true leaves appear. Protect from cold snaps.
Vegetative Growth
4-6 weeksLong vines develop with large lobed leaves. Rapid stem elongation and leaf production. Vines spread rapidly across the growing area.
Provide strong support or wide spacing. Keep soil consistently moist. Apply mulch to retain moisture and regulate soil temperature. Side-dress with compost mid-season.
Flowering
3-4 weeksLarge yellow male and female flowers appear. Female flowers have a small fruit bulge at the base.
Ensure adequate bee activity for pollination; consider hand-pollinating if bee activity is low. Maintain consistent moisture during flowering. Apply potassium-rich fertilizer to support fruit development.
Fruit Development
4-6 weeksSmall green fruits begin forming and rapidly enlarging. Fruits develop warty, ridged skin texture. Color gradually shifts from green to red-orange.
Reduce watering to focus plant energy on fruit ripening and sugar concentration. Stop nitrogen fertilizer to prevent excessive vine growth. Support developing fruits with straw or cardboard to prevent ground rot.
Maturity & Harvest
2-3 weeks to harvest, 2 weeks curingSkin hardens, color deepens to dark red-orange, and the stem becomes woody and drying. Fruits reach 6-8 inches in diameter and weigh 3-5 pounds.
Allow vines to remain until first light frost kills foliage, which triggers final ripening. Harvest before hard freeze. Cure fruits in warm (75-80°F), well-ventilated space for 2 weeks to harden skin.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Plant resistant varieties when possible; wrap stem bases with aluminum foil; inject Bacillus thuringiensis (Bt) into stems at first sign; remove infected vines immediately.
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Hand-pick egg clusters and adults; use floating row covers on young plants; plant trap crops like nasturtium; spray with neem oil or insecticidal soap.
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Improve air circulation by pruning lower leaves; apply sulfur dust or fungal spray weekly; water at soil level, not foliage; remove severely infected leaves.
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Use floating row covers on seedlings; hand-pick beetles; set yellow sticky traps; spray with spinosad or pyrethrin; plant companion herbs that repel beetles.
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and
Rotate crop locations; ensure well-draining soil; avoid overhead watering; remove and destroy infected plants; mulch to prevent soil splash.
Uses
Roasting and Soups
CulinaryRed Hubbard's dense, sweet orange flesh is ideal for roasting, puréeing into soups, and making pies. The flesh has a rich, nutty flavor and creamy texture when cooked. [source]
Nutritional Content
CulinaryExceptionally high in beta-carotene, vitamin C, fiber, and potassium. Supports eye health, immune function, and digestive health. [source]
Long-term Storage Vegetable
HouseholdOne of the finest storage squash varieties, capable of lasting several months when properly cured and stored in cool conditions. Ideal for extending the harvest through winter. [source]
Antioxidant Support
MedicinalRich in carotenoids and antioxidants that reduce inflammation and oxidative stress. Traditional use in supporting overall wellness and immune resilience. [source]
Ornamental & Fall Decoration
CraftWith striking red-orange color and warty texture, Red Hubbard squash is popular as autumn décor and harvest displays. The fruits retain their appearance for months. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest after first light frost when skin hardens and cannot be pierced by a fingernail. Cut fruits with 2-3 inches of stem attached. Store in cool (50-55°F), humid conditions; properly cured Red Hubbard squash can keep 3-6 months. Do not wash before storage; brush off excess soil gently.
Fun Facts
- 🌱 Red Hubbard squash was first popularized in the late 1800s and named after the Hubbard family who grew and promoted it in New England.
- 🌱 Mature Red Hubbard vines can spread 15-20 feet across the garden, making them one of the most vigorous winter squash varieties.
- 🌱 The warty, bumpy skin provides excellent insulation, which is why Red Hubbard was traditionally used by early American colonists as a winter food staple that could feed families through lean months.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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