Blog

When to Plant Microgreens in Ohio County, IN

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.

Ohio County, Indiana is in USDA Zone 6a. The average last spring frost is April 17 and the first fall frost is October 19, giving you a growing season of approximately 185 days.

At an elevation of 882 feet, Ohio County receives approximately 33.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 89ยฐF, providing good warmth for Microgreens during the growing season.

Ohio County, IN (Zone 6a) Moderate season
185 days
Last Spring Frost April 17
185 growing days
First Fall Frost October 19

Ohio County Soil Profile

Soil Type

Silt Loam

Soil pH

5.7-7.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (152 days to spare)
Start indoors: Mar 6 Transplant: Apr 10 🍅 Harvest: Apr 17 – May 15
Recommended (50%) ✓ Fits season (150 days to spare)
Start indoors: Mar 13 Transplant: Apr 17 🍅 Harvest: Apr 24 – May 22
Safe Start (90%) ✓ Fits season (143 days to spare)
Start indoors: Apr 2 Transplant: May 7 🍅 Harvest: May 14 – Jun 11

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
0.8″/week
You supply
0.5″/week
Watering frequency 1-2 times/week
Season total 888 gal / 100 sq ft
Microgreens needs ~234 GDD — county provides 3,098 GDD Excellent fit

Microgreens Planting Timeline โ€” Ohio County, IN

Microgreens Planting Calendar

Activity When Date Range
Start Indoors March 13 Mar 13 โ€“ Mar 27
Transplant Outdoors April 17 Apr 17 โ€“ May 1
Direct Sow April 3 Apr 3 โ€“ Apr 24
Fall Sowing August 10 Aug 10 โ€“ Aug 24
Harvest April 24 Apr 24 โ€“ May 22

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March Start Indoors
April Transplant Outdoors Direct Sow Harvest
May Transplant Outdoors Harvest
June โ€”
July โ€”
August Fall Sowing
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 6a

Growing Season

185 days

Growing Tips for Ohio 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 Ohio County, IN?

Ohio County is in Zone 6a with an average last frost of April 17. Plan your Microgreens planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Ohio County, IN?

Ohio County, Indiana is in USDA Hardiness Zone 6a. The average last spring frost is April 17 and first fall frost is October 19.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Ohio County gardeners in Zone 6a organize planting dates, track what's growing, and never miss a planting window.

Get Your Free Garden Planner →

Free download. Plan your entire garden season in minutes.

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