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When to plant Garlic in Schoolcraft County, MI

In Schoolcraft County, plant Garlic in spring between mid-spring and late spring, once soil temps hold above 50°F. Schoolcraft County's last frost averages May 14, so time plantings around the expected last-frost window for best survival. For a fall crop, sow between August 31 and September 14 — roughly 90–240 days before the first frost on October 12.

When to Plant Garlic in Schoolcraft County, MI

Garlic
Schoolcraft County, Michigan Zone 5a June

June to-do list for Schoolcraft County, Michigan

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.

Avg. last frost May 14
Avg. first frost October 12
Soil temp (4") 64°F
Watering Low
Pest pressure High
Daylight 15.5 hrs

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Garlic is a pungent allium planted in fall and harvested the following summer. Hardneck varieties produce edible flower stalks (scapes) and are more cold-hardy.

Schoolcraft County, Michigan is in USDA Zone 5a. The average last spring frost is May 14 and the first fall frost is October 12, giving you a growing season of approximately 151 days.

At an elevation of 1,121 feet, Schoolcraft County receives approximately 37.2 inches of rainfall annually with predominantly silt loam soil. Summer highs average 82°F, so choose short-season varieties of Garlic to ensure they mature before fall.

Schoolcraft County, MI (Zone 5a) Moderate season
151 days
Last Spring Frost May 14
151 growing days
First Fall Frost October 12

Schoolcraft County Soil Profile

Soil Type

Silt Loam

Soil pH

6-7

Drainage

Well Drained

Garlic Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Transplant: May 7 🍅 Harvest: Aug 6 – Oct 22
Recommended (50%) ✗ May not fit
Transplant: May 14 🍅 Harvest: Aug 13 – Oct 29
Safe Start (90%) ✗ May not fit
Transplant: May 27 🍅 Harvest: Aug 26 – Nov 11

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 Schoolcraft County

How your county's soil matches Garlic's growing requirements.

Soil pH

Your soil pH (6.0–7.0) is within Garlic's preferred range (6.0–7.5).

Soil Texture

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

Organic Matter

Organic matter is excellent (4.1%) — Garlic will thrive.

How to Plant Garlic

1"
Planting Depth
6"
Between Plants
12"
Between Rows

Fall planting: Sow 6 weeks before your first frost date for a fall harvest.

Garlic Water Budget

Plant needs
0.5″/week
Rainfall provides
1.0″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft

Monthly Watering Guide for Garlic

Garlic needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.

Month Garlic Needs Rainfall You Supplement Action
Jan 1.5" 0" ❄️ Dormant
Feb 1.7" 0" ❄️ Dormant
Mar 2.5" 0" ❄️ Dormant
Apr 3.4" 0" ❄️ Dormant
May 2.2" 4.5" 0" ✅ Rainfall sufficient
Jun 2.2" 4.4" 0" ✅ Rainfall sufficient
Jul 2.2" 4.2" 0" ✅ Rainfall sufficient
Aug 2.2" 4" 0" ✅ Rainfall sufficient
Sep 2.2" 3.1" 0" ✅ Rainfall sufficient
Oct 2.2" 3" 0" ✅ Rainfall sufficient
Nov 2.5" 0" ❄️ Dormant
Dec 2.2" 0" ❄️ Dormant

Water needs are for active growing months only (May–Oct in Schoolcraft County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Garlic 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.

Garlic needs ~1,898 GDD — county provides 1,736 GDD Tight fit

Garlic Planting Timeline — Schoolcraft County, MI

Garlic Planting Calendar

Activity When Date Range
Harvest November 30 Nov 30 – Feb 15
Fall Sowing August 31 Aug 31 – Sep 14

Plant 1" deep · 6" apart · Rows 12" apart

Month-by-Month Timeline

MonthActivities
January Harvest
February Harvest
March
April
May
June
July
August Fall Sowing
September Fall Sowing
October
November Harvest
December Harvest

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.5"/week · Natural rainfall sufficient

📅 Days to Maturity

90–240 days

🧪 Soil pH

Needs 6–7.5 · Your soil: ideal

🗺️ USDA Zone

Zone 5a

📆 Growing Season

151 days in Schoolcraft County

Growing Tips for Garlic in Schoolcraft County

Direct sow Garlic outdoors after May 14 in Schoolcraft County when soil has warmed and frost danger has passed.

Your 151.0-day growing season in Schoolcraft County is tight for Garlic (90.0-240.0 days to maturity). Start indoors and choose early-maturing varieties.

Common pests for Garlic in this region include onion maggots and thrips. Use row covers early in the season and inspect plants weekly.

General growing tips

Plant individual cloves pointed end up in fall, 6 weeks before ground freezes. Mulch heavily with straw. Harvest when lower leaves begin to brown but 5-6 green leaves remain.

Companion Planting

Good Companions

Avoid Planting Near

  • Peas
  • Green Beans
  • Asparagus

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Garlic in Schoolcraft County, MI?

Schoolcraft County is in Zone 5a with an average last frost of May 14. Plan your Garlic planting based on this frost date — see the calendar above for exact timing.

What planting zone is Schoolcraft County, MI?

Schoolcraft County, Michigan is in USDA Hardiness Zone 5a. The average last spring frost is May 14 and first fall frost is October 12.

When should I plant Garlic in Schoolcraft County, MI?

In Schoolcraft County, MI, plant Garlic after the last frost (around May 14) and before the first frost (around October 12). Best results when soil holds above 50°F.

What growing zone is Schoolcraft County, MI for Garlic?

Schoolcraft County sits in USDA Zone 5a. Garlic grows reliably in zones 3a through 9b, so it's a good fit here.

Can Garlic grow in Schoolcraft County's climate?

Yes — Garlic grows well in Schoolcraft County's temperate climate. Schoolcraft County averages a 151-day frost-free season, with last frost around May 14 and first frost around October 12.

🌱

Your Schoolcraft County Garden Planner — Free

A 22-page printable planner built for Schoolcraft County (Zone 5a). 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 Schoolcraft County, MI. Local conditions may vary. Last updated: June 2026.

Sources & credits

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