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When to Plant Parsnip in Addison County, VT

Parsnips are a sweet, nutty root vegetable that develops best flavor after exposure to frost. They require a long growing season but reward patient gardeners.

Addison County, Vermont is in USDA Zone 4b. The average last spring frost is May 14 and the first fall frost is October 2, giving you a growing season of approximately 141 days.

At an elevation of 1,052 feet, Addison County receives approximately 46.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 80ยฐF, so choose short-season varieties of Parsnip to ensure they mature before fall.

Addison County, VT (Zone 4b) Short season
141 days
Last Spring Frost May 14
141 growing days
First Fall Frost October 2

Addison County Soil Profile

Soil Type

Silt Loam

Soil pH

5.1-6.4

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Transplant: May 9 🍅 Harvest: Aug 22 – Oct 3
Recommended (50%) ✗ May not fit
Transplant: May 14 🍅 Harvest: Aug 27 – Oct 8
Safe Start (90%) ✗ May not fit
Transplant: Jun 2 🍅 Harvest: Sep 15 – Oct 27

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
1.4″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Parsnip needs ~1,150 GDD — county provides 1,410 GDD Good fit

Parsnip Planting Timeline โ€” Addison County, VT

Parsnip Planting Calendar

Activity When Date Range
Direct Sow May 7 May 7 โ€“ May 28
Fall Sowing July 10 Jul 10 โ€“ Jul 24
Harvest August 20 Aug 20 โ€“ Oct 1

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 Fall Sowing
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

100โ€“130 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 4b

Growing Season

141 days

Growing Tips for Addison County

Use only fresh seed as parsnip seed viability declines rapidly. Sow directly in spring in deeply worked soil. Leave roots in the ground through winter for sweetest flavor.

Companion Planting

Good Companions

Avoid Planting Near

  • Carrots
  • Celery

Level Up Your Garden

Frequently Asked Questions

When should I plant Parsnip in Addison County, VT?

Addison County is in Zone 4b with an average last frost of May 14. Plan your Parsnip planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Addison County, VT?

Addison County, Vermont is in USDA Hardiness Zone 4b. The average last spring frost is May 14 and first fall frost is October 2.

๐ŸŒฑ

Plan Your Garden with Confidence

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