Root Vegetable

When to Plant Garlic in Minnesota

Plant in fall, harvest in summer. Garlic is one of the most rewarding crops for the patient gardener.

The Short Answer

In Minnesota, soil conditions are an important factor for garlic. Rich prairie soils in south and west. Rocky and thin soils in north. Generally excellent for gardening in southern half. Garlic can also be planted in fall, 6 weeks before your first frost.

Minnesota Frost Dates

Your planting dates depend on which part of Minnesota you're in. Here are the frost date ranges by region:

Region Zones Last Frost (Spring) First Frost (Fall)
Northern Minnesota 3a, 3b May 15 - Jun 1 Sep 5 - Sep 20
Central Minnesota 3b, 4a May 5 - May 20 Sep 15 - Oct 1
Southern Minnesota 4a, 4b Apr 25 - May 10 Sep 25 - Oct 10

Garlic Planting Schedule for Minnesota

Northern Minnesota (Zones 3a, 3b)

Average last frost: May 15 - Jun 1 · Average first frost: Sep 5 - Sep 20

Fall Planting
6 wks before first frost

Central Minnesota (Zones 3b, 4a)

Average last frost: May 5 - May 20 · Average first frost: Sep 15 - Oct 1

Fall Planting
6 wks before first frost

Southern Minnesota (Zones 4a, 4b)

Average last frost: Apr 25 - May 10 · Average first frost: Sep 25 - Oct 10

Fall Planting
6 wks before first frost

Growing Garlic in Minnesota

Garlic in Minnesota's Climate

Your cold winters are garlic's secret weapon. Hardneck varieties — the type with the best flavor and those coveted scapes — actually require prolonged cold (vernalization) to form proper bulbs. Plant cloves in October, 6 weeks before the ground freezes, and mulch heavily. The cloves root before winter, sleep under snow, and explode with growth in spring. Northern gardeners grow the best garlic in America because the cold is an asset, not a limitation.

Soil Considerations for Minnesota

Rich prairie soils in south and west. Rocky and thin soils in north. Generally excellent for gardening in southern half. Loose, well-drained soil is especially important for garlic since the edible portion grows underground. If your soil is heavy clay, consider raised beds.

Minnesota Climate & Growing Season

Long, cold winters. Warm summers. Short but productive growing season with long summer days. Hardy varieties essential. Garlic can handle frost well, which is an advantage in Minnesota's climate. You can push planting dates earlier in spring and extend into fall.

Growing season length varies across Minnesota: Northern Minnesota (3a, 3b) has a last frost around May 15 - Jun 1, while Southern Minnesota (4a, 4b) sees frost end around Apr 25 - May 10. This difference matters for garlic — adjust your planting dates to match your specific region.

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:

Tomatoes Peppers Lettuce Beets

Keep garlic away from:

Beans Peas

The Bottom Line

Garlic can be grown successfully across Minnesota, but your exact planting dates depend on which region you're in. Northern Minnesota gardeners should plan around a May 15 - Jun 1 last frost, while those in Southern Minnesota can typically plant earlier. For exact dates based on your zip code, use our free planting date finder.

Related Guides

Garlic Growing Guide National planting guide with all states Minnesota Planting Calendar All plants for Minnesota Garlic in Alabama Alabama planting dates Garlic in Alaska Alaska planting dates Garlic in Arizona Arizona planting dates Garlic in Arkansas Arkansas planting dates
Note: All dates are based on NOAA 30-year Climate Normals and represent historical averages, not predictions for any specific year. Always check your local weather forecast before planting frost-sensitive crops. Learn about our data sources.

Last reviewed: March 29, 2026

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