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When to Plant Microgreens in Wadena County, MN

Microgreens are young seedlings of vegetables and herbs harvested at the cotyledon or first true leaf stage. They pack concentrated flavors and nutrients in a tiny package.

Wadena County, Minnesota is in USDA Zone 3b. The average last spring frost is May 13 and the first fall frost is September 27, giving you a growing season of approximately 137 days.

At an elevation of 1,320 feet, Wadena County receives approximately 40.1 inches of rainfall annually with predominantly silt loam soil. Summer highs average 79ยฐF, so choose short-season varieties of Microgreens to ensure they mature before fall.

Wadena County, MN (Zone 3b) Short season
137 days
Last Spring Frost May 13
137 growing days
First Fall Frost September 27

Wadena County Soil Profile

Soil Type

Silt Loam

Soil pH

6.1-7.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (103 days to spare)
Start indoors: Mar 23 Transplant: May 4 🍅 Harvest: May 11 – Jun 8
Recommended (50%) ✓ Fits season (102 days to spare)
Start indoors: Apr 1 Transplant: May 13 🍅 Harvest: May 20 – Jun 17
Safe Start (90%) ✓ Fits season (105 days to spare)
Start indoors: Apr 10 Transplant: May 22 🍅 Harvest: May 29 – Jun 26

Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
1.2″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 103 gal / 100 sq ft
Drought risk

Water stress score is 6/10 โ€” consider drought-tolerant varieties and mulching

Microgreens needs ~130 GDD — county provides 1,267 GDD Excellent fit

Microgreens Planting Timeline โ€” Wadena County, MN

Microgreens Planting Calendar

Activity When Date Range
Start Indoors April 1 Apr 1 โ€“ Apr 15
Transplant Outdoors May 13 May 13 โ€“ May 27
Direct Sow May 6 May 6 โ€“ May 27
Fall Sowing July 5 Jul 5 โ€“ Jul 19
Harvest May 20 May 20 โ€“ Jun 17

Plant 0.5" deep ยท 2" apart ยท Rows 6" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April Start Indoors
May Transplant Outdoors Direct Sow Harvest
June Harvest
July Fall Sowing
August โ€”
September โ€”
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Partial Shade (3-6 hours)

Water

Moderate โ€” regular watering

Days to Maturity

7โ€“21 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 3b

Growing Season

137 days

Growing Tips for Wadena County

Sow seeds densely on shallow trays of moist growing medium. Cover until germination, then provide light. Harvest with scissors when 1-3 inches tall. Grow year-round indoors.

Frequently Asked Questions

When should I plant Microgreens in Wadena County, MN?

Wadena County is in Zone 3b with an average last frost of May 13. Plan your Microgreens planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Wadena County, MN?

Wadena County, Minnesota is in USDA Hardiness Zone 3b. The average last spring frost is May 13 and first fall frost is September 27.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Wadena County gardeners in Zone 3b organize planting dates, track what's growing, and never miss a planting window.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Wadena County, MN. Local conditions may vary. Last updated: April 2026.