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When to Plant Soybeans in Racine County, WI

Soybeans (edamame) are a high-protein legume that fixes nitrogen in the soil. Fresh green soybeans harvested at the edamame stage are a nutritious snack.

Racine County, Wisconsin is in USDA Zone 5b. The average last spring frost is April 24 and the first fall frost is October 13, giving you a growing season of approximately 172 days.

At an elevation of 513 feet, Racine County receives approximately 39 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84ยฐF, so choose short-season varieties of Soybeans to ensure they mature before fall.

Racine County, WI (Zone 5b) Moderate season
172 days
Last Spring Frost April 24
172 growing days
First Fall Frost October 13

Racine County Soil Profile

Soil Type

Silt Loam

Soil pH

5.8-6.9

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (33 days to spare)
Transplant: Apr 17 🍅 Harvest: Jul 10 – Sep 4
Recommended (50%) ✓ Fits season (32 days to spare)
Transplant: Apr 24 🍅 Harvest: Jul 17 – Sep 11
Safe Start (90%) ✓ Fits season (33 days to spare)
Transplant: May 12 🍅 Harvest: Aug 4 – Sep 29

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
0.1″/week
Watering frequency Only during dry spells
Season total 73 gal / 100 sq ft
Soybeans needs ~1,300 GDD — county provides 2,236 GDD Excellent fit

Soybeans Planting Timeline โ€” Racine County, WI

Soybeans Planting Calendar

Activity When Date Range
Direct Sow May 1 May 1 โ€“ May 22
Harvest July 24 Jul 24 โ€“ Sep 18

Plant 1" deep ยท 15" apart ยท Rows 24" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April โ€”
May Direct Sow
June โ€”
July Harvest
August Harvest
September Harvest
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

80โ€“120 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 5b

Growing Season

172 days

Growing Tips for Racine County

Direct sow after soil warms to 60F. Plant in blocks rather than rows for better pollination. Harvest for edamame when pods are plump and bright green.

Companion Planting

Good Companions

Avoid Planting Near

  • Onion
  • Garlic

Level Up Your Garden

Frequently Asked Questions

When should I plant Soybeans in Racine County, WI?

Racine County is in Zone 5b with an average last frost of April 24. Plan your Soybeans planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Racine County, WI?

Racine County, Wisconsin is in USDA Hardiness Zone 5b. The average last spring frost is April 24 and first fall frost is October 13.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Racine County gardeners in Zone 5b 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 Racine County, WI. Local conditions may vary. Last updated: April 2026.