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When to Plant Microgreens in McLeod 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.

McLeod County, Minnesota is in USDA Zone 4a. The average last spring frost is April 30 and the first fall frost is October 4, giving you a growing season of approximately 157 days.

At an elevation of 1,011 feet, McLeod County receives approximately 36.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84ยฐF, so choose short-season varieties of Microgreens to ensure they mature before fall.

McLeod County, MN (Zone 4a) Moderate season
157 days
Last Spring Frost April 30
157 growing days
First Fall Frost October 4

McLeod County Soil Profile

Soil Type

Silt Loam

Soil pH

5.7-7.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (122 days to spare)
Start indoors: Mar 13 Transplant: Apr 24 🍅 Harvest: May 1 – May 29
Recommended (50%) ✓ Fits season (122 days to spare)
Start indoors: Mar 19 Transplant: Apr 30 🍅 Harvest: May 7 – Jun 4
Safe Start (90%) ✓ Fits season (119 days to spare)
Start indoors: Apr 3 Transplant: May 15 🍅 Harvest: May 22 – Jun 19

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
1.0″/week
You supply
0.0″/week
Watering frequency Only during dry spells
Season total 37 gal / 100 sq ft
Microgreens needs ~182 GDD — county provides 2,041 GDD Excellent fit

Microgreens Planting Timeline โ€” McLeod County, MN

Microgreens Planting Calendar

Activity When Date Range
Start Indoors March 19 Mar 19 โ€“ Apr 2
Transplant Outdoors April 30 Apr 30 โ€“ May 14
Direct Sow April 23 Apr 23 โ€“ May 14
Fall Sowing July 12 Jul 12 โ€“ Jul 26
Harvest May 7 May 7 โ€“ Jun 4

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March Start Indoors
April Start Indoors Transplant Outdoors Direct Sow
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 4a

Growing Season

157 days

Growing Tips for McLeod 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 McLeod County, MN?

McLeod County is in Zone 4a with an average last frost of April 30. Plan your Microgreens planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is McLeod County, MN?

McLeod County, Minnesota is in USDA Hardiness Zone 4a. The average last spring frost is April 30 and first fall frost is October 4.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help McLeod County gardeners in Zone 4a 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 McLeod County, MN. Local conditions may vary. Last updated: April 2026.