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When to Plant Celeriac in Sheboygan County, WI

Celeriac is a celery relative grown for its knobby, flavorful root rather than its stalks. It has a rich celery flavor and is excellent roasted, mashed, or in soups.

Sheboygan County, Wisconsin is in USDA Zone 5a. The average last spring frost is April 27 and the first fall frost is October 17, giving you a growing season of approximately 173 days.

At an elevation of 710 feet, Sheboygan County receives approximately 30.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84ยฐF, so choose short-season varieties of Celeriac to ensure they mature before fall.

Sheboygan County, WI (Zone 5a) Moderate season
173 days
Last Spring Frost April 27
173 growing days
First Fall Frost October 17

Sheboygan County Soil Profile

Soil Type

Silt Loam

Soil pH

6.2-7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (31 days to spare)
Start indoors: Mar 19 Transplant: Apr 23 🍅 Harvest: Aug 6 – Sep 10
Recommended (50%) ✓ Fits season (33 days to spare)
Start indoors: Mar 23 Transplant: Apr 27 🍅 Harvest: Aug 10 – Sep 14
Safe Start (90%) ✓ Fits season (30 days to spare)
Start indoors: Apr 7 Transplant: May 12 🍅 Harvest: Aug 25 – Sep 29

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
1.5″/week
Rainfall provides
0.7″/week
You supply
0.8″/week
Watering frequency 2-3 times/week
Season total 1,166 gal / 100 sq ft
Celeriac needs ~1,430 GDD — county provides 2,249 GDD Excellent fit

Celeriac Planting Timeline โ€” Sheboygan County, WI

Celeriac Planting Calendar

Activity When Date Range
Start Indoors March 23 Mar 23 โ€“ Apr 6
Transplant Outdoors April 27 Apr 27 โ€“ May 11
Direct Sow April 13 Apr 13 โ€“ May 4
Fall Sowing August 8 Aug 8 โ€“ Aug 22
Harvest August 10 Aug 10 โ€“ Sep 14

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March Start Indoors
April Start Indoors Transplant Outdoors Direct Sow
May Transplant Outdoors Direct Sow
June โ€”
July โ€”
August Fall Sowing Harvest
September Harvest
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

High โ€” keep soil consistently moist

Days to Maturity

100โ€“120 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 5a

Growing Season

173 days

Growing Tips for Sheboygan County

Start seeds indoors 10-12 weeks before last frost. Remove side roots as they develop to encourage a single large bulb. Harvest after a light frost for best flavor.

Companion Planting

Good Companions

Avoid Planting Near

  • Carrots
  • Parsnip

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Frequently Asked Questions

When should I plant Celeriac in Sheboygan County, WI?

Sheboygan County is in Zone 5a with an average last frost of April 27. Plan your Celeriac planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Sheboygan County, WI?

Sheboygan County, Wisconsin is in USDA Hardiness Zone 5a. The average last spring frost is April 27 and first fall frost is October 17.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Sheboygan County gardeners in Zone 5a 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 Sheboygan County, WI. Local conditions may vary. Last updated: April 2026.