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When to Plant Christmas Lima Beans in Chittenden County, VT

Christmas lima beans are a large, beautifully marbled heirloom bean with a rich, chestnut-like flavor. They are a climbing variety that produces generously in warm weather.

Chittenden County, Vermont is in USDA Zone 4b. The average last spring frost is May 12 and the first fall frost is October 5, giving you a growing season of approximately 146 days.

At an elevation of 235 feet, Chittenden County receives approximately 38.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 82ยฐF, so choose short-season varieties of Christmas Lima Beans to ensure they mature before fall.

Chittenden County, VT (Zone 4b) Short season
146 days
Last Spring Frost May 12
146 growing days
First Fall Frost October 5

Chittenden County Soil Profile

Soil Type

Silt Loam

Soil pH

4.8-6.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (0 days to spare)
Start indoors: Mar 4 Transplant: May 27 🍅 Harvest: Aug 19 – Sep 23
Recommended (50%) ✓ Fits season (6 days to spare)
Start indoors: Mar 10 Transplant: Jun 2 🍅 Harvest: Aug 25 – Sep 29
Safe Start (90%) ✓ Fits season (3 days to spare)
Start indoors: Mar 30 Transplant: Jun 22 🍅 Harvest: Sep 14 – Oct 19

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
1.1″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Christmas Lima Beans needs ~1,035 GDD — county provides 1,679 GDD Excellent fit

Christmas Lima Beans Planting Timeline โ€” Chittenden County, VT

Christmas Lima Beans Planting Calendar

Activity When Date Range
Start Indoors March 10 Mar 10 โ€“ Mar 24
Transplant Outdoors June 2 Jun 2 โ€“ Jun 16
Direct Sow May 26 May 26 โ€“ Jun 16
Harvest August 25 Aug 25 โ€“ Sep 29

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March Start Indoors
April โ€”
May Direct Sow
June Transplant Outdoors Direct Sow
July โ€”
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€“100 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 4b

Growing Season

146 days

Growing Tips for Chittenden County

Direct sow after soil is warm. Provide tall trellising for vigorous vines. Harvest for fresh shelling when pods are plump or allow to dry on the vine for storage.

Companion Planting

Good Companions

Avoid Planting Near

  • Onion
  • Garlic

Level Up Your Garden

Frequently Asked Questions

When should I plant Christmas Lima Beans in Chittenden County, VT?

Chittenden County is in Zone 4b with an average last frost of May 12. Plan your Christmas Lima Beans planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Chittenden County, VT?

Chittenden County, Vermont is in USDA Hardiness Zone 4b. The average last spring frost is May 12 and first fall frost is October 5.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Chittenden County gardeners in Zone 4b 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 Chittenden County, VT. Local conditions may vary. Last updated: April 2026.