Buttercup Squash
Cucurbita maxima 'Buttercup'
vegetableA dark green turban-shaped winter squash with exceptionally sweet, dry, dense orange flesh that tastes like sweet potato crossed with pumpkin. One of the most flavorful winter squashes for baking and pies. The distinctive turban shape makes it a beautiful fall decoration as well as a culinary ingredient. Stores well for 3 to 4 months.
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Sun
full sun
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Water
Every 3 days
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Harvest
~100 days
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Difficulty
easy
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Lifecycle
annual
One season, then done
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Spacing
3-4 ft between plants
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Planting Depth
1 in
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Soil pH
6.0-7.0
Growing Details
Soil Type
Rich, well-draining
Hardiness Zones
Zones 3 – 10
Grown as an annual — this range is its winter hardiness, but you can grow it for a single season in any zone.
When to Fertilize
At planting with rich compost; side-dress when vines extend to 2 feet
Fertilizer
Rich compost at planting; balanced 10-10-10; low-nitrogen at flowering
🌱 Growing Guide
Direct sow after last frost or transplant 3-week-old starts when soil is warm. Vines spread 6 to 8 feet. Allow 95 to 100 days on the vine for full maturity. The turban shape means the cap (the blossom end) ripens at a different rate than the base — harvest when the base rind is hard and the stem is corky and dry. Cure at room temperature for 10 days after harvest.
Planting Calendar
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Start seeds indoors
Mar 25
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Transplant outdoors
Apr 29
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Projected first harvest
Aug 7
JJan
FFeb
MMar
AApr
MMay
JJun
JJul
AAug
SSep
OOct
NNov
DDec
✅ Plant alongside
Good neighbors that attract beneficial insects or deter pests
- Corn — Three sisters partner; provides light structure
- Beans — Nitrogen fixing; three sisters classic combination
- Nasturtium — Deters squash bugs at bed border; edible flowers
- Borage — Attracts pollinators for fruit set; said to deter squash pests
❌ Keep away from
Potato
🛡️ Pest & disease prevention
Proactive ways to stop trouble before it starts — tap a name with an arrow for its full guide
Row cover until flowering; Bt application at stem base in June-July; foil wrap on stem
Handpick adults and bronze egg masses weekly; destroy plant debris
Late-season mildew is common; neem oil if fruit not yet mature
Row cover on seedlings; kaolin clay spray; sticky traps
🌾 Harvest & storage
Harvest when the rind is very hard and the stem is fully corky and dry. The turban portion (blossom end cap) should feel as hard as the base. Cut with 2 to 3 inches of stem attached. Cure at 75 to 80 F for 10 days. Store at 50 to 55 F for 3 to 4 months. To cook, cut in half or quarters and roast cut-side-down at 400 F for 45 to 60 minutes.
🥗 Nutrition & benefits
Excellent source of beta-carotene (vitamin A), vitamin C, potassium, and fiber. The dense, dry flesh is high in complex carbohydrates. One of the highest-sugar winter squash, making it a natural sweetener in soups and baked goods.
For educational and informational purposes only — HomeSown is not medical, health, or other professional advice. Always positively identify any plant before handling or eating it; some plants, and some parts of otherwise-edible plants, are toxic. Consult a qualified professional before consuming or otherwise using any plant, especially if you are pregnant, nursing, taking medication, or have a health condition.