Seeds
Waltham Butternut Squash Seeds, Award-Winning Heirloom
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Waltham Butternut Squash Seeds, the award-winning AAS heirloom (Cucurbita moschata) and America's most popular butternut. Vine borer resistant with sweet, nutty flesh. Shipped from Kansas.
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📖 Read our complete growing guide for this variety →
The gold standard of butternut squash. Waltham Butternut produces reliable harvests of smooth-skinned, tan fruits with sweet, fine-grained orange flesh. Developed at the Waltham Field Station in Massachusetts, this AAS winner stores beautifully for months.
Growing Guide
| Botanic Name | Cucurbita moschata |
| Life Cycle | Annual |
| Maturity | 100 to 110 days |
| Sun | Full sun (6+ hours) |
| Plant Spacing | 36,48″ apart |
| Sowing Depth | 1″ |
| Vine Habit | Vine |
| Fruit Weight | 3 to 6 lbs |
| Fruit Color | Tan/buff |
| Best For | Eating, storage |
| Frost Hardy | No |
| Start Indoors | Yes, 3 weeks |
| Container Friendly | No |
| Disease & Pest Resistance | Vine borer resistant (moschata type), powdery mildew tolerant |
| Storage Life | 3 to 6 months, cured and kept in a cool room |
| Peak Eating Window | Cure 10 to 14 days, flavor improves about a month after harvest |
Also known as: Waltham, Butternut Waltham
SKU: APP-SEED-MOS-WB-10 · APP-SEED-MOS-WB-20
History & Origin
Developed in the 1960s at the University of Massachusetts Waltham Field Station by breeder Bob Young. Waltham Butternut won the prestigious All-America Selections award in 1970 and quickly became the most widely grown butternut variety in North America. Its uniform bell shape, smooth tan skin, and small seed cavity set the standard that all other butternuts are measured against. A true heirloom that has stood the test of time.
In the Kitchen
The quintessential soup squash, peel, cube, and simmer with aromatics for a velvety butternut soup. Equally excellent roasted with olive oil and sage, pureed into risotto, or used as ravioli filling. Stores 3,6 months in a cool, dry place, developing sweeter flavor over time. The dense, fine-grained flesh holds its shape beautifully when roasted or cubed into stews.
Related Reading
Kansas Variety Guide · Kansas Planting Calendar
📖 Complete Waltham Butternut Growing Guide, planting tips, harvest timing, and kitchen uses for Kansas Zone 6b gardens. · Vine Borer Prevention Guide
Untreated, open-pollinated heirloom seed. No fungicide coating. Save your own seed from your strongest fruit and grow it again next year.
Quick Specs
| Species | Cucurbita moschata |
| Days to maturity | 100 to 110 |
| Sowing | 1 in deep, hills 4 to 6 ft apart |
| Sun | Full sun |
| Vine habit | Vines 10 to 15 ft |
| Fruit size | 3 to 5 lb |
| Pest resistance | Highly vine borer resistant. Solid moschata stems are hard for borer larvae to tunnel into. Resistant, not immune, so still scout in June and July. |
Common Questions
Is Waltham Butternut really vine borer resistant?
Highly vine borer resistant. Solid moschata stems are hard for borer larvae to tunnel into. Resistant, not immune, so still scout in June and July.
When should I plant Waltham Butternut in Kansas?
Direct sow or transplant once soil holds 65 to 70 F, typically mid May to early June in Zone 6b. At 100 to 110 days to maturity, a late May planting ripens in September to October, right on time for curing before frost.
How long does Waltham Butternut store after harvest?
Cured fruit stores 3 to 6 months in a cool dry spot. Harvest when the skin is fully tan and the stem is corky, and cure for a week or two in a warm room first.
What growers are saying
Shipping & Satisfaction
We ship seeds and coffee via USPS from Newton, Kansas. Orders typically ship within 1-2 business days.
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Growing Tips
Each seed packet includes detailed growing instructions. For additional help, visit our Growing Guides or reach out to us directly.
Complete your patch
Most growers plant three or four varieties. Free shipping on orders over $25.00.
