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When to Plant Garlic in Wabash County, IL

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.

Wabash County, Illinois is in USDA Zone 6a. The average last spring frost is April 9 and the first fall frost is October 28, giving you a growing season of approximately 202 days.

At an elevation of 880 feet, Wabash County receives approximately 32.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 91ยฐF, providing good warmth for Garlic during the growing season.

Wabash County, IL (Zone 6a) Long season
202 days
Last Spring Frost April 9
202 growing days
First Fall Frost October 28

Wabash County Soil Profile

Soil Type

Silt Loam

Soil pH

5.9-7.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (6 days to spare)
Transplant: Apr 2 🍅 Harvest: Jul 2 – Oct 15
Recommended (50%) ✓ Fits season (6 days to spare)
Transplant: Apr 9 🍅 Harvest: Jul 9 – Oct 22
Safe Start (90%) ✓ Fits season (12 days to spare)
Transplant: Apr 22 🍅 Harvest: Jul 22 – Nov 4

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
0.7″/week
You supply
0.3″/week
Watering frequency 1-2 times/week
Season total 568 gal / 100 sq ft
Garlic needs ~3,011 GDD — county provides 3,686 GDD Good fit

Garlic Planting Timeline โ€” Wabash County, IL

Garlic Planting Calendar

Activity When Date Range
Fall Sowing September 16 Sep 16 โ€“ Sep 30

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 โ€”
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 6a

Growing Season

202 days

Growing Tips for Wabash 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 Wabash County, IL?

Wabash County is in Zone 6a with an average last frost of April 9. Plan your Garlic planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Wabash County, IL?

Wabash County, Illinois is in USDA Hardiness Zone 6a. The average last spring frost is April 9 and first fall frost is October 28.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Wabash County gardeners in Zone 6a 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 Wabash County, IL. Local conditions may vary. Last updated: April 2026.