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When to Plant Celeriac in Lincoln 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.

Lincoln County, Wisconsin is in USDA Zone 4a. The average last spring frost is May 19 and the first fall frost is September 28, giving you a growing season of approximately 132 days.

At an elevation of 1,129 feet, Lincoln County receives approximately 37.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 81ยฐF, so choose short-season varieties of Celeriac to ensure they mature before fall.

Lincoln County, WI (Zone 4a) Short season
132 days
Last Spring Frost May 19
132 growing days
First Fall Frost September 28

Lincoln County Soil Profile

Soil Type

Silt Loam

Soil pH

6.2-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Start indoors: Apr 1 Transplant: May 13 🍅 Harvest: Aug 26 – Sep 30
Recommended (50%) ✗ May not fit
Start indoors: Apr 7 Transplant: May 19 🍅 Harvest: Sep 1 – Oct 6
Safe Start (90%) ✗ May not fit
Start indoors: Apr 21 Transplant: Jun 2 🍅 Harvest: Sep 15 – Oct 20

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
1.2″/week
You supply
0.3″/week
Watering frequency 1-2 times/week
Season total 364 gal / 100 sq ft
Celeriac needs ~1,182 GDD — county provides 1,419 GDD Good fit

Celeriac Planting Timeline โ€” Lincoln County, WI

Celeriac Planting Calendar

Activity When Date Range
Start Indoors April 7 Apr 7 โ€“ Apr 21
Transplant Outdoors May 19 May 19 โ€“ Jun 2
Direct Sow May 12 May 12 โ€“ Jun 2
Fall Sowing July 6 Jul 6 โ€“ Jul 20
Harvest September 1 Sep 1 โ€“ Oct 6

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April Start Indoors
May Transplant Outdoors Direct Sow
June Transplant Outdoors Direct Sow
July Fall Sowing
August โ€”
September Harvest
October Harvest
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 4a

Growing Season

132 days

Growing Tips for Lincoln 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

Level Up Your Garden

Frequently Asked Questions

When should I plant Celeriac in Lincoln County, WI?

Lincoln County is in Zone 4a with an average last frost of May 19. Plan your Celeriac planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Lincoln County, WI?

Lincoln County, Wisconsin is in USDA Hardiness Zone 4a. The average last spring frost is May 19 and first fall frost is September 28.

๐ŸŒฑ

Plan Your Garden with Confidence

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