Cool-Season Vegetable

When to Plant Spinach in Michigan

Fast from seed to salad. Spinach bolts in heat, so plant early in spring and again in fall.

The Short Answer

Michigan's cool springs and falls are spinach's ideal, and the state's long spring — with temperatures hovering in the 50s and 60s for weeks — produces some of the best spinach in the Midwest. Northern Michigan and the UP can grow spinach even into summer because temperatures rarely exceed 80°F.

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

Spinach Planting Schedule for Michigan

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

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

Direct Sow
6 wks before frost
Fall Planting
6 wks before first frost

Northern Lower Michigan (Zones 5a, 5b)

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

Direct Sow
6 wks before frost
Fall Planting
6 wks before first frost

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

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

Direct Sow
6 wks before frost
Fall Planting
6 wks before first frost

Growing Spinach in Michigan

State-Specific Growing Tips

Direct sow from mid-April. Michigan's cool, gradual spring means spinach grows longer without bolting than in states where temperatures spike quickly. In the north, summer spinach production is genuinely possible — one of Michigan's unique gardening advantages. Fall sowing in late August produces into November. Sandy western soils need compost for moisture retention.

Recommended Varieties for Michigan

Bloomsdale for spring. Tyee for disease resistance. Space for smooth leaves ideal for salads. In northern Michigan, try season-long varieties — the cool climate reduces bolting pressure.

Common Challenges in Michigan

Bolting in southern Michigan's July-August heat. Leaf miners. Downy mildew in cool, wet springs. Slugs in western Michigan's damp conditions.

Growing Tips

Direct sow as soon as soil can be worked in spring. For fall, plant 6-8 weeks before first frost.

Companion Planting

Plant spinach alongside these companions for better growth:

Strawberries Peas Radishes

The Bottom Line

Spinach 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

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

Ready to Start Planting?

Enter your zip code and pick your plant. We'll tell you exactly when to plant, start seeds, and harvest — based on where you live.

Find Your Planting Dates