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When to Plant Microgreens in Benton County, MO

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.

Benton County, Missouri is in USDA Zone 6a. The average last spring frost is April 9 and the first fall frost is October 25, giving you a growing season of approximately 199 days.

At an elevation of 1,323 feet, Benton County receives approximately 39.3 inches of rainfall annually with predominantly silt loam soil. Summer highs average 90ยฐF, providing good warmth for Microgreens during the growing season.

Benton County, MO (Zone 6a) Moderate season
199 days
Last Spring Frost April 9
199 growing days
First Fall Frost October 25

Benton County Soil Profile

Soil Type

Silt Loam

Soil pH

5.3-6.6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (161 days to spare)
Start indoors: Feb 28 Transplant: Apr 4 🍅 Harvest: Apr 11 – May 9
Recommended (50%) ✓ Fits season (164 days to spare)
Start indoors: Mar 5 Transplant: Apr 9 🍅 Harvest: Apr 16 – May 14
Safe Start (90%) ✓ Fits season (160 days to spare)
Start indoors: Mar 24 Transplant: Apr 28 🍅 Harvest: May 5 – Jun 2

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
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Drought risk

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

Microgreens needs ~245 GDD — county provides 3,482 GDD Excellent fit

Microgreens Planting Timeline โ€” Benton County, MO

Microgreens Planting Calendar

Activity When Date Range
Start Indoors March 5 Mar 5 โ€“ Mar 19
Transplant Outdoors April 9 Apr 9 โ€“ Apr 23
Direct Sow March 26 Mar 26 โ€“ Apr 16
Fall Sowing August 16 Aug 16 โ€“ Aug 30
Harvest April 16 Apr 16 โ€“ May 14

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March Start Indoors Direct Sow
April Transplant Outdoors Direct Sow Harvest
May 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

199 days

Growing Tips for Benton 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 Benton County, MO?

Benton County is in Zone 6a with an average last frost of April 9. Plan your Microgreens planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Benton County, MO?

Benton County, Missouri is in USDA Hardiness Zone 6a. The average last spring frost is April 9 and first fall frost is October 25.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Benton County gardeners in Zone 6a 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 Benton County, MO. Local conditions may vary. Last updated: April 2026.