Butternut Squash Planting Guide

Butternut squash is a popular winter squash with a long neck, small seed cavity, and sweet, nutty orange flesh. It stores exceptionally well for months.

Cucurbita moschata · Vegetable · Cucurbitaceae family · 85–110 days to maturity

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Where Can You Grow Butternut Squash?

Zone Compatibility for Butternut Squash Zones 3a – 11b

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Ideal (data available) Suitable Marginal Not recommended

Planting Dates by Zone

Zone	Start Indoors	Direct Sow	Transplant	Harvest
Zone 3a	Apr 3	May 29	Jun 5	Sep 4 – Oct 9
Zone 3b	Mar 29	May 24	May 31	Aug 30 – Oct 4
Zone 4a	Mar 25	May 20	May 27	Aug 26 – Sep 30
Zone 4b	Mar 20	May 15	May 22	Aug 21 – Sep 25
Zone 5a	Mar 21	May 2	May 9	Aug 8 – Sep 12
Zone 5b	Mar 14	Apr 25	May 2	Aug 1 – Sep 5
Zone 6a	Mar 6	Apr 17	Apr 24	Jul 24 – Aug 28
Zone 6b	Feb 27	Apr 10	Apr 17	Jul 17 – Aug 21
Zone 7a	Feb 25	Apr 1	Apr 8	Jul 8 – Aug 12
Zone 7b	Feb 18	Mar 25	Apr 1	Jul 1 – Aug 5
Zone 8a	Feb 8	Mar 15	Mar 22	Jun 21 – Jul 26
Zone 8b	Jan 28	Mar 4	Mar 11	Jun 10 – Jul 15
Zone 9a	Jan 13	Feb 10	Feb 17	May 19 – Jun 23
Zone 9b	Dec 28	Jan 25	Feb 1	May 3 – Jun 7
Zone 10a	Dec 4	Jan 1	Jan 8	Apr 9 – May 14
Zone 10b	Dec 4	Jan 1	Jan 8	Apr 9 – May 14
Zone 11a	Dec 4	Jan 1	Jan 8	Apr 9 – May 14
Zone 11b	Dec 4	Jan 1	Jan 8	Apr 9 – May 14

How to Plant Butternut Squash

Planting Depth

30"

Between Plants

42"

Between Rows

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

Moderate — regular watering

Water when the top inch of soil feels dry. Consistent moisture produces the best results.

🧪 Soil pH

6 – 7

Prefers neutral to slightly acidic soil — ideal for most garden beds.

🗺️ Hardiness Zones

Zone 3a – 11b

📅 Days to Maturity

85–110 days

Medium-season crop. Start early for best results in shorter seasons.

👪 Plant Family

Cucurbitaceae

Rotate with other families yearly to prevent soil-borne diseases. Don't plant in the same spot where Cucurbitaceae family crops grew last year.

How Much Butternut Squash to Grow

Butternut Squash takes 85–110 days to mature. In most zones you'll get one harvest per season, so plant enough to last.

Companion Planting for Butternut Squash

✅ Good Companions

Corn Green Beans Radish

❌ Keep Away From

Potatoes

Check more combinations with our Companion Planting Checker →

Growing Tips for Butternut Squash

Start seeds indoors 3 weeks early or direct sow after frost. Allow 6-8 feet for sprawling vines. Harvest when the skin is hard and uniformly tan. Cure in the sun for 10 days.

Saving Butternut Squash Seeds

Recommended for Your Garden

🌱

Seed Starting Trays $8-20

Start seeds indoors with reusable cell trays and humidity domes.

🧪

Soil Test Kit $12-25

Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.

🏷️

Garden Plant Markers $6-12

Keep your garden organized with durable, weather-resistant plant labels.

Level Up Your Garden

Seed Saving & Storage Guide

Learn when to harvest, how to dry, and how to store seeds from 200 plants. Never buy seeds again.

Learn More →

Butternut Squash by State

Frequently Asked Questions

How long does it take to grow Butternut Squash?

Butternut Squash (Cucurbita moschata) takes 85 to 110 days from planting to harvest. Exact timing depends on your variety, growing conditions, and USDA zone.

What zones can Butternut Squash grow in?

Butternut Squash can be grown in USDA zones 3a through 11b. Use the planting calendar above to find the exact dates for your zone.

How much sun does Butternut Squash need?

Growing Butternut Squash requires Full Sun (6-8+ hours), Moderate — regular watering, and soil pH of 6 to 7.

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