When to Plant Garlic in Michigan
Plant in fall, harvest in summer. Garlic is one of the most rewarding crops for the patient gardener.
The Short Answer
Michigan Frost Dates
Your planting dates depend on which part of Michigan you're in. Here are the frost date ranges by region:
| Region | Zones | Last Frost (Spring) | First Frost (Fall) |
|---|---|---|---|
| Upper Peninsula | 4a, 4b, 5a | May 15 - Jun 5 | Sep 10 - Sep 25 |
| Northern Lower Michigan | 5a, 5b | May 10 - May 25 | Sep 20 - Oct 5 |
| Southern Michigan | 5b, 6a, 6b | Apr 25 - May 10 | Oct 1 - Oct 15 |
Garlic Planting Schedule for Michigan
Upper Peninsula (Zones 4a, 4b, 5a)
Average last frost: May 15 - Jun 5 · Average first frost: Sep 10 - Sep 25
Northern Lower Michigan (Zones 5a, 5b)
Average last frost: May 10 - May 25 · Average first frost: Sep 20 - Oct 5
Southern Michigan (Zones 5b, 6a, 6b)
Average last frost: Apr 25 - May 10 · Average first frost: Oct 1 - Oct 15
Growing Garlic in Michigan
State-Specific Growing Tips
Plant cloves from late September (Upper Peninsula) through mid-October (southern Michigan). Michigan's sandy western soils are naturally ideal for garlic — they drain freely and warm up quickly in spring. Southeast Michigan's clay soils need serious amendment: incorporate compost and perlite, or build raised beds. Mulch with 4-6 inches of straw immediately after planting — Michigan's winters are cold enough that unmulched garlic may suffer root damage. The UP should use 6-8 inches of mulch. Cut scapes in early to mid-June. Harvest when lower leaves brown — typically early to mid-July in southern Michigan, late July in the north.
Recommended Varieties for Michigan
Michigan's cold winters (Zones 4b-6a) are ideal for hardneck types. Music is the Michigan standard — it's been the top variety at Michigan garlic festivals for years. German Extra Hardy thrives in the UP's harsh winters. Purple Glazer and Chesnok Red add visual beauty and complex flavor. Rocambole varieties (Spanish Roja, German Red) produce intensely flavored cloves that are easy to peel. MSU Extension's garlic growing guide is an excellent resource.
Common Challenges in Michigan
Michigan's main garlic challenge is excessive spring moisture in clay soils causing Fusarium basal rot. Drainage is critical. Lake effect snow provides excellent insulation in western Michigan but can create saturated conditions in spring. Leek moth larvae bore into leaves and stems — an emerging pest in the upper Midwest. Remove and destroy any infested plant material.
Growing Tips
Plant individual cloves pointy-side up in fall, 4-6 weeks before ground freezes. Mulch heavily. Harvest when lower leaves brown.
Companion Planting
Plant garlic alongside these companions for better growth:
Keep garlic away from:
The Bottom Line
Last reviewed: March 29, 2026