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When to Plant Garlic in Washington County, VT

Garlic is a pungent allium planted in fall and harvested the following summer. Hardneck varieties produce edible flower stalks (scapes) and are more cold-hardy.

Washington County, Vermont is in USDA Zone 4a. The average last spring frost is May 12 and the first fall frost is October 7, giving you a growing season of approximately 148 days.

At an elevation of 959 feet, Washington County receives approximately 41.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 80ยฐF, so choose short-season varieties of Garlic to ensure they mature before fall.

Washington County, VT (Zone 4a) Short season
148 days
Last Spring Frost May 12
148 growing days
First Fall Frost October 7

Washington County Soil Profile

Soil Type

Silt Loam

Soil pH

5.1-6.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (3 days to spare)
Transplant: May 6 🍅 Harvest: Aug 5 – Sep 30
Recommended (50%) ✓ Fits season (1 days to spare)
Transplant: May 12 🍅 Harvest: Aug 11 – Oct 6
Safe Start (90%) ✓ Fits season (1 days to spare)
Transplant: May 25 🍅 Harvest: Aug 24 – 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
1.2″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Garlic needs ~1,650 GDD — county provides 1,480 GDD May not mature

Garlic Planting Timeline โ€” Washington County, VT

Garlic Planting Calendar

Activity When Date Range
Fall Sowing August 26 Aug 26 โ€“ Sep 9

Plant 1" deep ยท 6" apart ยท Rows 12" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April โ€”
May โ€”
June โ€”
July โ€”
August Fall Sowing
September Fall Sowing
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

90โ€“240 days

Soil pH

6 โ€“ 7.5

USDA Zone

Zone 4a

Growing Season

148 days

Growing Tips for Washington County

Plant individual cloves pointed end up in fall, 6 weeks before ground freezes. Mulch heavily with straw. Harvest when lower leaves begin to brown but 5-6 green leaves remain.

Companion Planting

Good Companions

Avoid Planting Near

  • Peas
  • Green Beans
  • Asparagus

Level Up Your Garden

Frequently Asked Questions

When should I plant Garlic in Washington County, VT?

Washington County is in Zone 4a with an average last frost of May 12. Plan your Garlic planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Washington County, VT?

Washington County, Vermont is in USDA Hardiness Zone 4a. The average last spring frost is May 12 and first fall frost is October 7.

๐ŸŒฑ

Plan Your Garden with Confidence

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