Buttercup

Family: Cucurbitaceae Vegetable

Planting Schedule

Provide your location or planting zone to unlock dates and add Buttercup to a garden.

Buttery-sweet Buttercup Squash delivers a vivid, sunlit exterior and a dense, velvety interior that feels almost custardy when fully ripened.

The flesh is rich and aromatic with a smooth, fine-grained texture that holds its character beautifully for roasting and mashing, and it also shines in soups, sauces, and hearty baked preparations. Grow Buttercup for a dependable 95-day harvest and a showpiece squash that tastes as good as it looks.

Light: Full SunMaturity: 95 DaysHabit: Vine

Location not set yet

Enter your ZIP for local crop dates

Buttercup Planting Dates by USDA Zone

Estimated US hardiness-zone windows for sow, transplant, and harvest. Enter a US ZIP above for exact local dates, or open a zone below.

Zone	Start Indoors	Sow / Transplant	Harvest
Zone 1a	Protected Environment Only
Zone 1b	Protected Environment Only
Zone 2a	May 18th	Jun 1st	Sep 4th – Aug 29th
Zone 2b	May 8th	May 22nd	Aug 25th – Aug 25th
Zone 3a	May 8th	May 22nd	Aug 25th – Sep 1st
Zone 3b	May 12th	May 26th	Aug 29th – Sep 21st
Zone 4a	May 8th	May 22nd	Aug 25th – Sep 24th
Zone 4b	May 6th	May 20th	Aug 23rd – Sep 27th
Zone 5a	May 1st	May 15th	Aug 18th – Sep 30th
Zone 5b	Apr 27th	May 11th	Aug 14th – Oct 5th
Zone 6a	Apr 24th	May 8th	Aug 11th – Oct 10th
Zone 6b	Apr 18th	May 2nd	Aug 5th – Oct 16th
Zone 7a	Apr 13th	Apr 27th	Jul 31st – Oct 20th
Zone 7b	Apr 3rd	Apr 17th	Jul 21st – Oct 28th
Zone 8a	Mar 25th	Apr 8th	Jul 12th – Nov 5th
Zone 8b	Mar 16th	Mar 30th	Jul 3rd – Nov 12th
Zone 9a	Feb 27th	Mar 13th	Jun 16th – Nov 26th
Zone 9b	Feb 2nd	Feb 16th	May 22nd – Dec 9th
Zone 10a	Continuous Production
Zone 10b	Continuous Production
Zone 11a	Continuous Production
Zone 11b	Continuous Production
Zone 12a	Continuous Production
Zone 12b	Continuous Production
Zone 13a	Continuous Production
Zone 13b	Continuous Production

Crop Details

Trait	Value
Days to Maturity	95
Sun Requirements	Full Sun
Growth Habit	Vine
Support Needed	Trellis
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	65
Min Night Temp (°F)	55
Harden Off (days)	10

Culinary Notes

Chef's Note

Buttercup’s fine-grained, custardy interior makes it ideal for cooking methods that rely on texture—not just flavor—like roasting then mashing or pureeing for a spoon-coating soup. It loves warm aromatics and a little funk (sage, brown butter, crème fraîche) because its sweetness stays luminous instead of cloying.

Best Uses

roast and mash, keeping the flesh spoonable and silky
thick pureed soup (blend until glass-smooth and let it nap the spoon)
brown-butter style squash sauce for pasta or gnocchi
baked squash custard or gratin where the interior sets like a soft custard

Flavor Profile

buttery-sweet squash flesh dense, velvety custard-like texture when fully ripened fine-grained roast caramel notes gentle aromatic richness with a soft finish

Kitchen Pairings

sage maple syrup brown butter garlic ginger crème fraîche

Frequently Asked Questions

My buttercup leaves are mottled and curling—what pest or disease is most likely, and what should I do?

Mottled, curling leaves on buttercup are often a sign of aphids feeding and spreading viruses. Spray the plants with a strong jet of water to knock aphids off, then apply insecticidal soap (especially under leaves) every 5–7 days for 2–3 rounds. Remove and discard any badly distorted plants to limit virus spread in the bed.

How often should I water buttercup during the main growing phase?

During active growth (about weeks 3–8 after germination), keep the top 1 inch of soil consistently moist but not waterlogged. Water deeply about 1–2 times per week, and increase frequency only if the top inch dries out quickly—avoid daily light watering. After the plants establish, reduce watering slightly to prevent crown rot in wet soils.

How can I tell when buttercup is ready to harvest (95 days)?

Harvest when flower buds are fully colored and just starting to open, and the stems are firm rather than soft. If you’re growing buttercup for seed, wait until the seed heads turn tan-brown and the seeds rattle inside when gently shaken. In both cases, harvest in the morning after dew dries to reduce rots on cut stems.