Acorn Squash Growing Guide
Acorn Squash At a Glance
Difficulty
Easy
Category
Vegetable
Sun Exposure
Full Sun
Frost Tolerance
Frost Tender
Cold Hardiness
Survives to 4°C
Plant Family
Cucurbitaceae
Growing Season
Warm Season
Plant Lifecycle
Annual
How to Start It
★ Recommended for beginners
Sow 2–3 seeds 2.5 cm deep in a rich mound once soil is warm (or start indoors 3 weeks early), thin to the strongest, 90 cm apart.
A small ribbed winter squash, quicker to mature (~85 days) than butternut, with a shorter storage life. Same easy culture as other squash: warmth, sun, rich soil and room to sprawl.
When To Start
Acorn Squash needs warmth. Wait until your last frost has passed and the soil has warmed before sowing.
We do not have exact sowing dates for this one yet.
When should you plant Acorn Squash?
Your planting dates depend on your local climate. Sign up and add your location to unlock personalized dates.
Your Acorn Squash Planting Window
Start planting
May 15, 2026
Last chance
Sep 10, 2026
Your Acorn Squash Calendar
Set your location to turn these into exact dates and reminders.
Start acorn squash indoors (short seasons)
3 weeks before your last frost· optional
Sow acorn squash (warm soil)
1 week after your last frost
Harvest acorn squash (deep green, hard rind)
About 85 days after you plant it
The Journey Ahead
Acorn Squash's Lifecycle
Seedling
Mature Plant
Seed Production
Step 1
Prepare Your Space
2.5 cm
Seeding Depth
90 cm
Plant Spacing
150 cm
Row Spacing
Vertical Growing
Yes – Trellis (support the fruit).
Succession Planting
No.
Good Companions
Bad Companions
Step 2
Planting & Sprouting
Expect sprouts in 7–14 days
Growing Tips
- 1Acorn squash is a good first winter squash — fast and productive.
- 2Feed and water well, support ripening fruit off the soil, and pinch late flowers so it ripens before frost.
Seedling Phase
Step 3
Growth & Maturity
~85
Days to Maturity
40 cm
Mature Height
250 cm
Mature Width
Pests to Watch For
Diseases to Watch For
Mature Plant
Step 4
Harvesting
Harvest Window
21 days
When to Pick
Cut when deep green with a hard rind and corky stem; before frost
How to Harvest
- 1Harvest once the skin is deep green and hard and the stem corky, before frost.
- 2Cure for a week; unlike most winter squash it's best eaten within a couple of months.
Step 5
Saving Seeds
How to Save Seeds
Scoop, rinse and dry seeds from a ripe fruit; isolate from other squash for true seed.
Seed Production
Ready to grow this?
Grow acorn squash with us.
This page is free and stays free. An account adds the one thing a guide cannot do on its own: your own frost dates, so it tells you the weeks to sow acorn squash where you live.
