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When to plant Celeriac in Springerton, IL

Springerton's spring Celeriac window runs March 25 through April 15. most warm-season crops establish quickly once soil holds above 60°F. A second sowing from August 18 to September 1 extends the harvest into fall.

When to Plant Celeriac in Springerton, IL

White County, Illinois Zone 7a August

What to do in August

We've pulled the most time-sensitive tasks for White County, Illinois this August and put them front and centre. Tackle them in order.

Avg. last frost April 8
Avg. first frost October 27
Soil temp (4") 84°F
Watering Moderate
Pest pressure High
Daylight 13.5 hrs
  1. Collect celeriac at their peak

    If you can't use it all right away, check the food-preservation section of your planner.

  2. Plant your fall garden: celeriac

    A row cover ready in the garage extends your harvest by weeks once the nights turn cold.

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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.

Springerton, Illinois is in USDA Zone 7a. The average last spring frost is April 8 and the first fall frost is October 27, giving you a growing season of approximately 202 days.

At an elevation of 788 feet, White County receives approximately 30.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 85°F, providing good warmth for Celeriac during the growing season.

Springerton, IL (Zone 7a) Long season
202 days
Last Spring Frost April 8
202 growing days
First Fall Frost October 27

Springerton Soil Profile

Soil Type

Silt Loam

Soil pH

5.8-7

Drainage

Well Drained

Celeriac Planting Risk Windows

Early Start (70% safe) ✓ Fits season (61 days to spare)
Start indoors: Feb 26 Transplant: Apr 2 🍅 Harvest: Jul 16 – Aug 20
Recommended (50%) ✓ Fits season (62 days to spare)
Start indoors: Mar 4 Transplant: Apr 8 🍅 Harvest: Jul 22 – Aug 26
Safe Start (90%) ✓ Fits season (68 days to spare)
Start indoors: Mar 16 Transplant: Apr 20 🍅 Harvest: Aug 3 – Sep 7

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.

Soil Compatibility in Springerton

How your county's soil matches Celeriac's growing requirements.

Soil pH

Your soil pH (5.8–7.0) overlaps with Celeriac's range (6.0–7.0), though not a perfect match.

Soil Texture

The silt loam soil in White County is excellent for Celeriac — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is excellent (4.7%) — Celeriac will thrive.

How to Plant Celeriac

1"
Planting Depth
15"
Between Plants
24"
Between Rows

Fall planting: Sow 10 weeks before your first frost date for a fall harvest.

Celeriac Water Budget

Plant needs
0.9″/week
Rainfall provides
0.6″/week
You supply
0.3″/week
Watering frequency 1-2 times/week
Season total 574 gal / 100 sq ft
Drought risk

Water stress score is 6/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Celeriac

Celeriac needs approximately 0.9 inches of water per week (3.9" per month). Here's how your county's rainfall compares month by month.

Month Celeriac Needs Rainfall You Supplement Action
Jan 1.1" 0" ❄️ Dormant
Feb 1.3" 0" ❄️ Dormant
Mar 2.1" 0" ❄️ Dormant
Apr 3.9" 3.2" 0.7" 💧 Light watering
May 3.9" 3.5" 0.4" 💧 Light watering
Jun 3.9" 3.6" 0.3" 💧 Light watering
Jul 3.9" 3.4" 0.5" 💧 Light watering
Aug 3.9" 3.5" 0.4" 💧 Light watering
Sep 3.9" 2.4" 1.5" 💧 Light watering
Oct 3.9" 2.5" 1.4" 💧 Light watering
Nov 2.1" 0" ❄️ Dormant
Dec 1.8" 0" ❄️ Dormant

Water needs are for active growing months only (Apr–Oct in White County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Celeriac Heat Requirements (GDD)

What are Growing Degree Days (GDD)?

Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.

Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.

Celeriac needs ~1,512 GDD — county provides 2,777 GDD Excellent fit

Celeriac Planting Timeline — Springerton, IL

Celeriac Planting Calendar

Activity When Date Range
Start Indoors March 4 Mar 4 – Mar 18
Transplant Outdoors April 8 Apr 8 – Apr 22
Direct Sow March 25 Mar 25 – Apr 15
Harvest July 22 Jul 22 – Aug 26
Fall Sowing August 18 Aug 18 – Sep 1

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

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.9"/week · 1-2 times/week

📅 Days to Maturity

100–120 days

🧪 Soil pH

Needs 6–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 7a

📆 Growing Season

202 days in White County

Growing Tips for Celeriac in Springerton

Direct sow Celeriac outdoors after April 08 in White County when soil has warmed and frost danger has passed.

Common pests for Celeriac in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.

General growing tips

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

Check more plant combinations with our Companion Planting Checker →

When should I plant Celeriac in Springerton, IL?

In Springerton, IL, plant Celeriac after the last frost (around April 8) and before the first frost (around October 27). Best results when soil holds above 50°F.

What growing zone is Springerton, IL for Celeriac?

Springerton sits in USDA Zone 7a. Celeriac grows reliably in zones 3a through 9b, so it's a good fit here.

Can Celeriac grow in Springerton's climate?

Yes — Celeriac grows well in Springerton's temperate climate. Springerton averages a 202-day frost-free season, with last frost around April 8 and first frost around October 27.

🌱

Your White County Garden Planner — Free

A 22-page printable planner built for White County (Zone 7a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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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 White County, IL. Local conditions may vary. Last updated: August 2026.