Seeds

Waltham Butternut Squash Seeds, Award-Winning Heirloom

$3.99

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Product details & growing guidance

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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Choose your patch: Need more of this variety? Choose 20 seeds for $5.99. Want three varieties? The $11.99 Seed Trio includes 10 seeds each of Waltham, Dickinson, and Seminole. Seeds only; shipping is additional below the free-shipping threshold.

✅ Germination Promise: if your seeds fail to germinate under proper growing conditions, contact us within one year and we will replace them or refund your purchase. See the details.

📖 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 Cucurbita moschata varieties are generally less susceptible to squash vine borers than many other squash, but damage is still possible. Growing conditions and care matter. Why species predicts survival here.
Life Cycle	Annual
Maturity	100 to 110 days
Sun	Full sun (6+ hours)
Plant Spacing	36-48″ in-row, with rows 6 to 8 ft 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 to 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.

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.

Will it ripen before frost? Waltham Butternut Squash needs 100 to 110 days from sowing. In a typical Newton, Kansas Zone 6b season the first fall frost arrives between October 10 and 20, so direct sow by about June 13 to finish with a two week cushion. Planting later, or gardening in a different zone? Check your own planting window.

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Shipping & Satisfaction

We ship physical products via USPS from Newton, Kansas. In-stock seeds and soap are processed within 1–2 business days, excluding holidays. Coffee ships weekly; orders placed by Wednesday typically ship by Friday. Preorders follow the date on the product page. Free shipping on seed orders $29.99+. Coffee ships at the paid rate shown at checkout. Shipping and taxes are calculated at checkout.

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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.

Our homestead & product care

Packed in Newton, Kansas Open-Pollinated and Non-GMO Free shipping on seed orders $29.99+ Family Homestead · Newton, KS

Seed life: 4 to 6 years stored cool, dry and dark. Germination is strongest in the first 2 to 3 years, so sow the freshest packet first and test older seed before you plan a bed around it.

From the patch to the porch

A little something for your prairie day

Pair your seeds with pumpkin spice coffee for the morning and a 4.5 oz cold process soap bar for the end of the day.

Pumpkin Pie Spice Coffee

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$16.99

Pumpkin Spice Soap

$7.99

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 6 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.