When to Plant Spinach in Minnesota
Direct Sow Outdoors
Sunday, March 29, 2026
State
Minnesota
USDA Zones
3a, 3b, 4a, 4b, 5a
Avg Last Frost
Sunday, May 10, 2026
Cities Covered
805
Minnesota Planting Schedule by Zone
Minnesota spans 5 zones — find yours below for the most accurate dates.
| Zone | Last Frost | Direct Sow |
|---|---|---|
| 3a | Monday, May 25, 2026 | Monday, April 13, 2026 |
| 3b | Wednesday, May 20, 2026 | Wednesday, April 8, 2026 |
| 4a | Friday, May 15, 2026 | Friday, April 3, 2026 |
| 4b | Tuesday, May 5, 2026 | Tuesday, March 24, 2026 |
| 5a | Sunday, May 10, 2026 | Sunday, March 29, 2026 |
Dates based on average last frost. Check your local forecast before planting.
🌿 About Spinach
🤝 Companion Plants for Spinach
Good Companions
Growing Spinach in Minnesota: Complete Guide
Spinach (Spinacia oleracea) is a crop that grows best when sown directly in the garden. In Minnesota, the right time to direct sow is around Sunday, March 29, 2026, once soil temperatures are consistently warm enough for germination.
Because Minnesota stretches across 5 USDA hardiness zones (3a, 3b, 4a, 4b, 5a), planting windows can shift by as much as six to eight weeks from one end of the state to the other. Gardeners in the warmer southern zones can start earlier, while those in cooler northern zones should wait until the zone table above shows their last frost has passed.
With 40 days to maturity, Spinach fits comfortably within Minnesota's growing season in most zones. In the warmest parts of the state, a second planting later in the season may be possible.
Spinach requires partial shade to full sun and regular (keep moist) moisture. Most of Minnesota receives adequate sunlight during the growing season, though gardeners in humid eastern regions should watch for fungal issues and ensure good air circulation.
For the most precise planting dates tailored to your exact location, enter your ZIP code on our planting calendar or use the zone table above to find the schedule for your area of Minnesota.
Growing Spinach in Minnesota: Local Tips
Climate-specific advice for Minnesota gardeners.
Early and fall are the productive windows
Plant in early April (as soon as soil reaches 40°F) for a May–June harvest; sow again in mid-August for fall harvest through November; summer spinach bolts immediately in Midwest heat.
Frequently Asked Questions
When should I plant Spinach in Minnesota?
In Minnesota, direct sow Spinach outdoors around Sunday, March 29, 2026. Minnesota spans zones 3a–5a, so gardeners in warmer zones can plant earlier.
What is the last frost date in Minnesota?
Minnesota spans 5 USDA zones (3a, 3b, 4a, 4b, 5a), so last frost dates vary by region. Embarrass, Soudan, Tower (3a) sees frost until around Monday, May 25, 2026, while Minneapolis, Afton, Bayport (5a) is frost-free much earlier.
How long does Spinach take to grow in Minnesota?
Spinach takes about 40 days from transplant (or direct sow) to harvest. In Minnesota's longer-season zones, a second planting in late summer may be possible.
What USDA zones does Minnesota cover for Spinach?
Minnesota includes zones 3a, 3b, 4a, 4b, 5a. Spinach grows well across all of these zones with adjusted timing — use the zone table above to find the right dates for your part of the state.
Find Precise Dates for Your City
Select a city for exact planting dates based on local frost records.