Customer Service Hours
Mon-Fri 8-4 MST
Features
Family
Cucurbitaceae
Native
Northern Columbia
Life Cycle
Annual
Plant Height
Vine
Further Information
Growing Conditions
Frost Sensitive
Plant Resistance
Squash Vine Borer Resistant
About Waltham Butternut Winter Squash Seeds
Cucurbita moschata
8"–12" long, 3–6 pounds, light tan skin with yellowish-orange flesh.
Planting Squash
Days to Maturity
100 days
Plant Spacing
2–3 seeds per mound
Light Required
Full sun
Plant Height
Vine
Planting Depth
½–1"
Planting Details
| Row Spacing | 6'–8' |
|---|---|
| Seed Depth | ½–1" |
| Seed Spacing | 2–3 seeds per mound |
| Thinning | When 3" leaves, thin to 1–2 per mound |
| Germination | 5–10 days |
| Start Indoors | Not recommended except in very short growing seasons, 2 to 4 weeks before your average last frost date. Roots sensitive to disturbance; sow in 4" biodegradable pots that can be planted directly into the ground. Transplant when soil temperature is at least 60°F. |
| Direct Sow | RECOMMENDED. 1 to 2 weeks after your average last frost date, and when soil temperature is 70°–85°F. |
| Growing & Harvesting | Harvest when the squash's rind is hard enough that you can't dent it with your fingernail and before first frost. Cut stem, (don't break it off) leaving 2" of stem attached, which keeps the squash whole, leaving no opening for infection. Though fruits are hard and may seem indestructible, treat them gently; bruising can spoil squash. |
Find Your Frost Date & Grow Zone
Average First Frost Date
October 19
Average Last Frost Date
May 19
Your Hardiness Zone is
5b
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Rating
Which best describes you as a gardener?
10 reviews
- Eliza S.Verified ReviewerRated 5 out of 5 stars10/2/26Truly disease resistant!
It is October and these butternut squash plants are thriving! All my other pumpkins and curbits got mildew and disease but the Waltham butternut looks fresh and green. Ten squash and counting from a few plants. They will spread and climb to no limit!!!! 10/10
Which best describes you as a gardener? IntermediateBIBotanical Interests10/5/26Hey Eliza,
We're so happy to hear that your Waltham Butternut Winter Squash Seeds are thriving and staying so healthy while your other plants dealt with mildew and disease! That's awesome that you're already counting ten squash and still going strong in October. Thanks so much for being part of the growing community! Keep on growing 🌻
- ChristineRated 5 out of 5 stars10/1/265 Stars
Im excited to plant these!
- Charlene D.TN, United StatesVerified BuyerRated 4 out of 5 stars11/15/25My favorite winter squash
Was a very good germination rate and a great harvest this year can't wait to grow them next year
Which best describes you as a gardener? BeginnerWho do you grow for? YourselfHow do you prefer to grow? In Ground - Philip L.Verified BuyerRated 5 out of 5 stars2/24/255 Stars
Great seeds.
- Erik P.Verified BuyerRated 4 out of 5 stars10/5/244 Stars
All seeds germinate with vigor except of course shiso, which I always have trouble with.
Which best describes you as a gardener? Intermediate