Blog

When to Plant Edamame in Kent County, MI

Edamame are soybeans harvested at the immature green stage for a sweet, nutty snack. They are high in protein and easy to grow in warm climates.

Kent County, Michigan is in USDA Zone 5b. The average last spring frost is May 7 and the first fall frost is October 9, giving you a growing season of approximately 155 days.

At an elevation of 617 feet, Kent County receives approximately 32.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83ยฐF, so choose short-season varieties of Edamame to ensure they mature before fall.

Kent County, MI (Zone 5b) Moderate season
155 days
Last Spring Frost May 7
155 growing days
First Fall Frost October 9

Kent County Soil Profile

Soil Type

Silt Loam

Soil pH

6-7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (38 days to spare)
Transplant: Apr 28 🍅 Harvest: Jul 14 – Aug 25
Recommended (50%) ✓ Fits season (36 days to spare)
Transplant: May 7 🍅 Harvest: Jul 23 – Sep 3
Safe Start (90%) ✓ Fits season (33 days to spare)
Transplant: May 26 🍅 Harvest: Aug 11 – Sep 22

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
0.9″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 567 gal / 100 sq ft
Edamame needs ~1,072 GDD — county provides 1,898 GDD Excellent fit

Edamame Planting Timeline โ€” Kent County, MI

Edamame Planting Calendar

Activity When Date Range
Direct Sow May 14 May 14 โ€“ Jun 4
Harvest July 30 Jul 30 โ€“ Sep 10

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 Direct Sow
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

75โ€“100 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 5b

Growing Season

155 days

Growing Tips for Kent County

Direct sow after soil is warm. Do not over-fertilize with nitrogen. Harvest when pods are plump and bright green but before they start to yellow. Steam or boil pods before eating.

Companion Planting

Good Companions

Avoid Planting Near

  • Onion
  • Garlic

Level Up Your Garden

Frequently Asked Questions

When should I plant Edamame in Kent County, MI?

Kent County is in Zone 5b with an average last frost of May 7. Plan your Edamame planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Kent County, MI?

Kent County, Michigan is in USDA Hardiness Zone 5b. The average last spring frost is May 7 and first fall frost is October 9.

๐ŸŒฑ

Plan Your Garden with Confidence

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