Cool-Season Vegetable

When to Plant Spinach in Minnesota

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

The Short Answer

Spinach are cold-tolerant and do well in Minnesota's varied climate. You can direct sow 6 weeks before your last frost — that's as early as May 15 - Jun 1 in Northern Minnesota. Minnesota gardeners can also plant a fall crop. Rich prairie soils in south and west. Rocky and thin soils in north. Generally excellent for...

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

Spinach Planting Schedule for Minnesota

Northern Minnesota (Zones 3a, 3b)

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

Direct Sow
6 wks before frost
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

Direct Sow
6 wks before frost
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

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

Growing Spinach in Minnesota

Spinach in Minnesota's Climate

Your cool climate extends the spinach season significantly compared to warmer zones. Direct sow as soon as soil thaws — spinach germinates in soil as cool as 35°F. Michigan and Minnesota gardeners may get 6-8 weeks of production before bolting versus 3-4 weeks in the South. Fall spinach from an August sowing is equally productive and often superior in quality.

Soil Considerations for Minnesota

Rich prairie soils in south and west. Rocky and thin soils in north. Generally excellent for gardening in southern half.

Minnesota Climate & Growing Season

Long, cold winters. Warm summers. Short but productive growing season with long summer days. Hardy varieties essential. Spinach 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 spinach — adjust your planting dates to match your specific region.

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 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

Spinach Growing Guide National planting guide with all states Minnesota Planting Calendar All plants for Minnesota 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