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When to Plant Acorn Squash in Wexford County, MI

Wexford County, Michigan Zone 5b May

May in Wexford County, Michigan — your action list

Here's what deserves your attention in Wexford County, Michigan this month. Everything below is tailored to Zone 5b and timed around your local frost dates.

Avg. last frost May 17
Avg. first frost October 4
Soil temp (4") 58°F
Watering Low
Pest pressure Low
Daylight 14.6 hrs
  1. Time to transplant acorn squash

    Pinch off the lowest leaves on each seedling before you plant — it reduces water loss while the roots catch up.

  2. Direct-sow acorn squash

    Keep the top inch of soil moist until germination — a gentle morning watering for 5–7 days does the job.

Coming up in June — start thinking about
  • Starting indoors: acorn squash

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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.

Wexford County, Michigan is in USDA Zone 5b. The average last spring frost is May 17 and the first fall frost is October 4, giving you a growing season of approximately 140 days.

At an elevation of 1,167 feet, Wexford County receives approximately 35.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84°F, so choose short-season varieties of Acorn Squash to ensure they mature before fall.

Wexford County, MI (Zone 5b) Short season
140 days
Last Spring Frost May 17
140 growing days
First Fall Frost October 4
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Wexford County Soil Profile

Soil Type

Silt Loam

Soil pH

6.2-6.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (8 days to spare)
Start indoors: Apr 7 Transplant: May 26 🍅 Harvest: Aug 18 – Sep 22
Recommended (50%) ✓ Fits season (7 days to spare)
Start indoors: Apr 12 Transplant: May 31 🍅 Harvest: Aug 23 – Sep 27
Safe Start (90%) ✓ Fits season (13 days to spare)
Start indoors: Apr 25 Transplant: Jun 13 🍅 Harvest: Sep 5 – Oct 10

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 Wexford County

How your county's soil matches Acorn Squash's growing requirements.

Soil pH

Your soil pH (6.2–6.8) is within Acorn Squash's preferred range (5.5–7.0).

Soil Texture

The silt loam soil in Wexford County is excellent for Acorn Squash — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is excellent (4.5%) — Acorn Squash will thrive.

How to Plant Acorn Squash

1"
Planting Depth
30"
Between Plants
42"
Between Rows

Plant Water Budget

Plant needs
1.1″/week
Rainfall provides
1.1″/week
You supply
0.0″/week
Watering frequency Only during dry spells
Season total 39 gal / 100 sq ft
Drought risk

Water stress score is 6/10 — consider drought-tolerant varieties and mulching

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 1.6" 0" ❄️ Dormant
Feb 1.6" 0" ❄️ Dormant
Mar 2.1" 0" ❄️ Dormant
Apr 3.7" 0" ❄️ Dormant
May 4.8" 4.3" 0.5" 💧 Light watering
Jun 4.8" 4.1" 0.7" 💧 Light watering
Jul 4.8" 4.3" 0.5" 💧 Light watering
Aug 4.8" 3.7" 1.1" 💧 Light watering
Sep 4.8" 3.4" 1.4" 💧 Light watering
Oct 4.8" 2.8" 2" 💧 Light watering
Nov 2.1" 0" ❄️ Dormant
Dec 2.2" 0" ❄️ Dormant

Water needs are for active growing months only (May–Oct in Wexford 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 needs ~1,170 GDD — county provides 1,820 GDD Excellent fit

Acorn Squash Planting Timeline — Wexford County, MI

Acorn Squash Planting Calendar

Activity When Date Range
Start Indoors April 12 Apr 12 – Apr 26
Transplant Outdoors May 31 May 31 – Jun 14
Direct Sow May 24 May 24 – Jun 14
Harvest August 23 Aug 23 – Sep 27

Plant 1" deep · 30" apart · Rows 42" apart

Month-by-Month Timeline

MonthActivities
January
February
March
April Start Indoors
May Transplant Outdoors Direct Sow
June Transplant Outdoors Direct Sow
July
August Harvest
September Harvest
October
November
December
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Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1.1"/week · Only during dry spells

📅 Days to Maturity

80–100 days

🧪 Soil pH

Needs 5.5–7 · Your soil: ideal

🗺️ USDA Zone

Zone 5b

📆 Growing Season

140 days in Wexford County

Growing Tips for Acorn Squash in Wexford County

Direct sow Acorn Squash outdoors after May 17 in Wexford 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

  • Potatoes

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Acorn Squash in Wexford County, MI?

Wexford County is in Zone 5b with an average last frost of May 17. Plan your Acorn Squash planting based on this frost date — see the calendar above for exact timing.

What planting zone is Wexford County, MI?

Wexford County, Michigan is in USDA Hardiness Zone 5b. The average last spring frost is May 17 and first fall frost is October 4.

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Your Wexford County Garden Planner — Free

A 24-page printable planner built for Wexford County (Zone 5b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Wexford County, MI. Local conditions may vary. Last updated: May 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.