When to plant Acorn Squash in Aroostook County County,
Aroostook County County sits in cold Zone 4a. Plant Acorn Squash June 1–June 22 for the single annual harvest; the September 24 first frost closes the window.
When to Plant Acorn Squash in Aroostook County, ME
Your June gardening checklist
If you only do a handful of things in the garden this June, make it these. They're sequenced around your zone's frost timing.
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Harden off and plant acorn squash
Harden off for 7 days — a little more sun each day — before planting. That's the difference between a seedling that thrives and one that stalls.
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Scatter acorn squash into prepared beds
Succession planting is the secret here. Put in a row now, another in 2 weeks, a third in 4.
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Fire up the seed-starting tray: acorn squash
Label every cell. You will absolutely forget which is which otherwise.
Acorn squash is a small winter squash with dark green, ribbed skin and mildly sweet orange flesh. It is perfect for stuffing and roasting as individual servings.
Aroostook County, Maine is in USDA Zone 4a. The average last spring frost is May 18 and the first fall frost is September 24, giving you a growing season of approximately 129 days.
At an elevation of 314 feet, Aroostook County receives approximately 39.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 78°F, so choose short-season varieties of Acorn Squash to ensure they mature before fall.
Aroostook County Soil Profile
Soil Type
Silt Loam
Soil pH
4.9-6.3
Drainage
Well Drained
Acorn Squash Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Soil Compatibility in Aroostook County
How your county's soil matches Acorn Squash's growing requirements.
Soil pH
Your soil pH (4.9–6.3) overlaps with Acorn Squash's range (5.5–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Aroostook County is excellent for Acorn Squash — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (3.8%). Annual compost additions will help Acorn Squash.
How to Plant Acorn Squash
Acorn Squash Water Budget
Monthly Watering Guide for Acorn Squash
Acorn Squash needs approximately 1.1 inches of water per week (4.8" per month). Here's how your county's rainfall compares month by month.
| Month | Acorn Squash Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 2.8" | 0" | ❄️ Dormant |
| Feb | — | 2.7" | 0" | ❄️ Dormant |
| Mar | — | 3.3" | 0" | ❄️ Dormant |
| Apr | — | 3.5" | 0" | ❄️ Dormant |
| May | 4.8" | 3.3" | 1.5" | 💧 Light watering |
| Jun | 4.8" | 3.7" | 1.1" | 💧 Light watering |
| Jul | 4.8" | 3.6" | 1.2" | 💧 Light watering |
| Aug | 4.8" | 3.6" | 1.2" | 💧 Light watering |
| Sep | 4.8" | 3.9" | 0.9" | 💧 Light watering |
| Oct | — | 3.2" | 0" | ❄️ Dormant |
| Nov | — | 2.9" | 0" | ❄️ Dormant |
| Dec | — | 3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Sep in Aroostook County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Acorn Squash Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Acorn Squash Planting Timeline — Aroostook County, ME
Acorn Squash Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 6 | Apr 6 – Apr 20 |
| Transplant Outdoors | June 8 | Jun 8 – Jun 22 |
| Direct Sow | June 1 | Jun 1 – Jun 22 |
| Harvest | August 31 | Aug 31 – Oct 5 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Start Indoors |
| May | — |
| June | Transplant Outdoors Direct Sow |
| July | — |
| August | Harvest |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.1"/week · Natural rainfall sufficient
📅 Days to Maturity
80–100 days
🧪 Soil pH
Needs 5.5–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 4a
📆 Growing Season
129 days in Aroostook County
Growing Tips for Acorn Squash in Aroostook County
Direct sow Acorn Squash outdoors after May 18 in Aroostook County when soil has warmed and frost danger has passed.
Common pests for Acorn Squash in this region include squash vine borer and cucumber beetles. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow after last frost. Harvest when the ground spot turns orange and the skin is hard. Acorn squash has a shorter storage life than butternut, lasting about 2 months.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Acorn Squash in Other Locations
Frequently Asked Questions
When should I plant Acorn Squash in Aroostook County, ME?
Aroostook County is in Zone 4a with an average last frost of May 18. Plan your Acorn Squash planting based on this frost date — see the calendar above for exact timing.
What planting zone is Aroostook County, ME?
Aroostook County, Maine is in USDA Hardiness Zone 4a. The average last spring frost is May 18 and first fall frost is September 24.
When should I plant Acorn Squash in Aroostook County County, ?
In Aroostook County County, , plant Acorn Squash after the last frost (around May 18) and before the first frost (around September 24). Best results when soil holds above 50°F.
What growing zone is Aroostook County County, for Acorn Squash?
Aroostook County County sits in USDA Zone 4a. Acorn Squash grows reliably in zones 3a through 11b, so it's a good fit here.
Can Acorn Squash grow in Aroostook County County's climate?
Yes — Acorn Squash grows well in Aroostook County County's temperate climate. Aroostook County County averages a 129-day frost-free season, with last frost around May 18 and first frost around September 24.
Your Aroostook County Garden Planner — Free
A 22-page printable planner built for Aroostook County (Zone 4a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.