Cool-Season Vegetable

When to Plant Lettuce in Michigan

Fast-growing and forgiving. Plant in spring and fall for a nearly year-round supply of fresh salad greens.

The Short Answer

Michigan's cool springs and falls create some of the best lettuce-growing conditions in the Midwest. The state's moderate summer temperatures — especially in the northern half and along the Lake Michigan shore — can even support summer lettuce production that would be impossible further south. Michigan gardeners can realistically grow lettuce from April through November with succession planting and basic protection.

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

Lettuce Planting Schedule for Michigan

Upper Peninsula (Zones 4a, 4b, 5a)

Average last frost: May 15 - Jun 5 · Average first frost: Sep 10 - Sep 25

Start Seeds Indoors
4 wks before frost
Transplant Outside
2 wks before frost
Direct Sow
4 wks before frost
Fall Planting
8 wks before first frost

Northern Lower Michigan (Zones 5a, 5b)

Average last frost: May 10 - May 25 · Average first frost: Sep 20 - Oct 5

Start Seeds Indoors
4 wks before frost
Transplant Outside
2 wks before frost
Direct Sow
4 wks before frost
Fall Planting
8 wks before first frost

Southern Michigan (Zones 5b, 6a, 6b)

Average last frost: Apr 25 - May 10 · Average first frost: Oct 1 - Oct 15

Start Seeds Indoors
4 wks before frost
Transplant Outside
2 wks before frost
Direct Sow
4 wks before frost
Fall Planting
8 wks before first frost

Growing Lettuce in Michigan

State-Specific Growing Tips

Direct sow as early as mid-April in southern Michigan, late April in the north — lettuce germinates in soil as cool as 40°F. The real advantage in Michigan is the extended season: northern Michigan and the lakeshore stay cool enough for summer lettuce production when most of the country has given up. In southern Michigan, lettuce bolts in July heat but can be resown in August for a fall crop that continues until hard freeze in October or November. Michigan's sandy western soils are ideal for lettuce — they warm quickly in spring and drain well. Southeast Michigan's clay needs compost amendment.

Recommended Varieties for Michigan

For spring: any standard variety works. For summer production in northern Michigan: Jericho, Muir, and Concept (slow-bolt Romaine). For fall: Winter Density and Rouge d'Hiver are cold-hardy and productive into November. Michigan State Extension's variety trials help narrow choices for specific regions.

Common Challenges in Michigan

Bolting in July-August heat (southern Michigan). Slugs are prevalent in Michigan's damp conditions — especially in western Michigan's lake effect zone. Rabbit damage is common statewide. Downy mildew can appear on lettuce in cool, wet conditions — space plants for air circulation.

Growing Tips

Succession plant every 2-3 weeks for continuous harvest. Shade cloth extends the season into warmer months.

Companion Planting

Plant lettuce alongside these companions for better growth:

Carrots Radishes Strawberries Chives

The Bottom Line

Lettuce can be grown successfully in Michigan with proper attention to regional frost dates and local growing conditions. Timing varies across the state — Upper Peninsula gardeners work with a last frost around May 15 - Jun 5, while Southern Michigan sees frost end around Apr 25 - May 10. Choose varieties suited to your region, amend your soil based on its specific needs, and monitor for the pests and diseases most common in your area. For exact dates based on your zip code, use our free planting date finder.

Related Guides

Lettuce Growing Guide National planting guide with all states Michigan Planting Calendar All plants for Michigan Lettuce in Alabama Alabama planting dates Lettuce in Alaska Alaska planting dates Lettuce in Arizona Arizona planting dates Lettuce 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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