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When to Plant Edamame in Blackford County, IN

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.

Blackford County, Indiana is in USDA Zone 5b. The average last spring frost is April 26 and the first fall frost is October 16, giving you a growing season of approximately 173 days.

At an elevation of 729 feet, Blackford County receives approximately 32.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87ยฐF, providing good warmth for Edamame during the growing season.

Blackford County, IN (Zone 5b) Moderate season
173 days
Last Spring Frost April 26
173 growing days
First Fall Frost October 16

Blackford County Soil Profile

Soil Type

Silt Loam

Soil pH

6-7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (50 days to spare)
Transplant: Apr 22 🍅 Harvest: Jul 8 – Aug 19
Recommended (50%) ✓ Fits season (54 days to spare)
Transplant: Apr 26 🍅 Harvest: Jul 12 – Aug 23
Safe Start (90%) ✓ Fits season (48 days to spare)
Transplant: May 12 🍅 Harvest: Jul 28 – Sep 8

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
0.2″/week
Watering frequency Only during dry spells
Season total 317 gal / 100 sq ft
Edamame needs ~1,334 GDD — county provides 2,638 GDD Excellent fit

Edamame Planting Timeline โ€” Blackford County, IN

Edamame Planting Calendar

Activity When Date Range
Direct Sow May 3 May 3 โ€“ May 24
Harvest July 19 Jul 19 โ€“ Aug 30

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 โ€”
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

173 days

Growing Tips for Blackford 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 Blackford County, IN?

Blackford County is in Zone 5b with an average last frost of April 26. Plan your Edamame planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Blackford County, IN?

Blackford County, Indiana is in USDA Hardiness Zone 5b. The average last spring frost is April 26 and first fall frost is October 16.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Blackford 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 Blackford County, IN. Local conditions may vary. Last updated: April 2026.