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When to Plant Soybeans in Essex County, VT

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.

Essex County, Vermont is in USDA Zone 3b. The average last spring frost is May 18 and the first fall frost is September 30, giving you a growing season of approximately 135 days.

At an elevation of 27 feet, Essex County receives approximately 39.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 79ยฐF, so choose short-season varieties of Soybeans to ensure they mature before fall.

Essex County, VT (Zone 3b) Short season
135 days
Last Spring Frost May 18
135 growing days
First Fall Frost September 30

Essex County Soil Profile

Soil Type

Silt Loam

Soil pH

5-6.4

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (6 days to spare)
Transplant: May 11 🍅 Harvest: Aug 3 – Sep 14
Recommended (50%) ✓ Fits season (9 days to spare)
Transplant: May 18 🍅 Harvest: Aug 10 – Sep 21
Safe Start (90%) ✓ Fits season (11 days to spare)
Transplant: Jun 2 🍅 Harvest: Aug 25 – Oct 6

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
1.2″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Soybeans needs ~925 GDD — county provides 1,248 GDD Excellent fit

Soybeans Planting Timeline โ€” Essex County, VT

Soybeans Planting Calendar

Activity When Date Range
Direct Sow June 1 Jun 1 โ€“ Jun 22
Harvest August 24 Aug 24 โ€“ Oct 5

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April โ€”
May โ€”
June Direct Sow
July โ€”
August Harvest
September Harvest
October Harvest
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 3b

Growing Season

135 days

Growing Tips for Essex 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 Essex County, VT?

Essex County is in Zone 3b with an average last frost of May 18. Plan your Soybeans planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Essex County, VT?

Essex County, Vermont is in USDA Hardiness Zone 3b. The average last spring frost is May 18 and first fall frost is September 30.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Essex County gardeners in Zone 3b 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 Essex County, VT. Local conditions may vary. Last updated: April 2026.