How to Grow Acorn Squash
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Supplies You'll Need
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Plant Overview
Growing Requirements
Sun
Full Sun (6-8 hours)
Water
Regular (1 inch/week)
Spacing
4 ft apart
Depth
1" deep
Height
12-18"
Germination
5-10 days
Ready to Grow Acorn Squash?
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Good Companions
Avoid Planting Near
Full Companion Planting Guide for Acorn Squash
See which plants help Acorn Squash thrive, which to keep away, and raised bed layout tips →
Seed Saving Guide
ModerateWhen to Harvest Seed
Let fruit mature fully on the vine — cure for 1 month after harvest before extracting seeds.
Processing
Scoop seeds from cured squash, rinse, dry flat for 2 weeks.
Seed Viability
Up to 4 years when stored cool, dark, and dry.
Pro Tip
Acorn squash (C. pepo) crosses with zucchini, delicata, and other C. pepo squashes. Isolate by 500 feet.
Seed Storage Supplies
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Raised Bed Planting Guides
A 4×8 bed fits 2 plants of Acorn Squash. See plant counts, spacing grids, and companion pairings for every bed size →
Acorn Squash Planting Calendar by Zone
Acorn Squash Planting Calendar by State
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Frequently Asked Questions
When should I plant Acorn Squash? +
Start Acorn Squash seeds indoors 4 weeks before your last frost date, then transplant outdoors 2 weeks after the last frost. Use the search on this page to find exact dates for your ZIP code or city.
How long does Acorn Squash take to grow? +
Acorn Squash typically matures in about 85 days from planting. Exact timing varies by variety, soil conditions, and local climate.
Should I start Acorn Squash indoors or direct sow? +
Acorn Squash should be started indoors 4 weeks before the last frost date. This gives seedlings time to establish before being transplanted outside after frost danger has passed.
How much sun does Acorn Squash need? +
Acorn Squash requires full sun (6-8 hours) to thrive.
How far apart should I plant Acorn Squash? +
Space Acorn Squash plants 48 inches apart to allow adequate airflow and root development.
How much water does Acorn Squash need? +
Acorn Squash has regular (1 inch/week) water needs. Consistent moisture is important especially during germination and early growth.
Can you save seeds from Acorn Squash? +
Yes — seed saving difficulty for Acorn Squash is rated moderate. Let fruit mature fully on the vine — cure for 1 month after harvest before extracting seeds. Scoop seeds from cured squash, rinse, dry flat for 2 weeks.
How long do Acorn Squash seeds last in storage? +
Properly dried and stored Acorn Squash seeds remain viable for up to 4 years. Store in a cool, dark, dry location in an airtight container with a silica gel packet for best results.
Are Acorn Squash seeds open-pollinated? +
Yes — Acorn Squash is open-pollinated, meaning seeds saved from your harvest will grow plants true to the parent variety. This makes it an excellent candidate for building a self-sustaining garden.
About Acorn Squash
Compact winter squash with sweet, nutty flavor. Dark green skin with orange flesh. Stores for 1-2 months after harvest.
Expect your Acorn Squash to be ready for harvest in approximately 85 days from planting.
Use the search above or browse by zone or state to find the perfect planting dates for your location.