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When to Plant Celery in Monroeville, OH

Celery
Huron County, Ohio Zone 6a July

July in Huron County, Ohio — your action list

July rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Huron County, Ohio.

Avg. last frost April 27
Avg. first frost October 18
Soil temp (4") 76°F
Watering Moderate
Pest pressure High
Daylight 14.7 hrs
  1. Pick celery

    Don't tug. Use scissors or pruners for clean cuts — torn stems invite disease.

Get ahead of August
  • First harvests: celery
  • Fall sowing: celery

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Celery is a marshland plant that requires consistent moisture and cool temperatures to produce crisp, flavorful stalks. It is a rewarding but demanding garden crop.

Monroeville, Ohio is in USDA Zone 6a. The average last spring frost is April 27 and the first fall frost is October 18, giving you a growing season of approximately 174 days.

At an elevation of 1,242 feet, Huron County receives approximately 32.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87°F, providing good warmth for Celery during the growing season.

Monroeville, OH (Zone 6a) Moderate season
174 days
Last Spring Frost April 27
174 growing days
First Fall Frost October 18

Monroeville Soil Profile

Soil Type

Silt Loam

Soil pH

6.1-7.1

Drainage

Well Drained

Celery Planting Risk Windows

Early Start (70% safe) ✓ Fits season (32 days to spare)
Start indoors: Mar 19 Transplant: Apr 23 🍅 Harvest: Jul 16 – Sep 10
Recommended (50%) ✓ Fits season (34 days to spare)
Start indoors: Mar 23 Transplant: Apr 27 🍅 Harvest: Jul 20 – Sep 14
Safe Start (90%) ✓ Fits season (31 days to spare)
Start indoors: Apr 8 Transplant: May 13 🍅 Harvest: Aug 5 – Sep 30

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 Monroeville

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

Soil pH

Your soil pH (6.1–7.1) overlaps with Celery's range (6.0–7.0), though not a perfect match.

Soil Texture

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

Organic Matter

Organic matter is moderate (4.0%). Annual compost additions will help Celery.

How to Plant Celery

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

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

Succession Planting Celery

2
successive plantings in your 174-day season

Sow every 9.1 weeks. Last sowing by Jun 20 to harvest before frost.

For a dedicated fall crop, sow by Aug 09.

Celery Water Budget

Plant needs
1.3″/week
Rainfall provides
0.8″/week
You supply
0.5″/week
Watering frequency 1-2 times/week
Season total 791 gal / 100 sq ft

Monthly Watering Guide for Celery

Celery needs approximately 1.3 inches of water per week (5.6" per month). Here's how your county's rainfall compares month by month.

Month Celery Needs Rainfall You Supplement Action
Jan 1.4" 0" ❄️ Dormant
Feb 1.6" 0" ❄️ Dormant
Mar 2" 0" ❄️ Dormant
Apr 5.6" 3.5" 2.1" 💧 Light watering
May 5.6" 4" 1.6" 💧 Light watering
Jun 5.6" 4" 1.6" 💧 Light watering
Jul 5.6" 3.6" 2" 💧 Light watering
Aug 5.6" 3" 2.6" 💧 Light watering
Sep 5.6" 2.5" 3.1" 🚿 Regular watering
Oct 5.6" 2.8" 2.8" 🚿 Regular watering
Nov 2.2" 0" ❄️ Dormant
Dec 2" 0" ❄️ Dormant

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

Celery 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.

Celery needs ~1,525 GDD — county provides 2,653 GDD Excellent fit

Celery Planting Timeline — Monroeville, OH

Celery Planting Calendar

Activity When Date Range
Start Indoors March 23 Mar 23 – Apr 6
Transplant Outdoors April 27 Apr 27 – May 11
Direct Sow April 13 Apr 13 – May 4
Harvest July 20 Jul 20 – Sep 14
Fall Sowing August 9 Aug 9 – Aug 23

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

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1.3"/week · 1-2 times/week

📅 Days to Maturity

80–120 days

🧪 Soil pH

Needs 6–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 6a

📆 Growing Season

174 days in Huron County

Growing Tips for Celery in Monroeville

Direct sow Celery outdoors after April 27 in Huron County when soil has warmed and frost danger has passed.

Common pests for Celery 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. Keep soil consistently moist and never let it dry out. Blanch stalks by mounding soil or using collars for milder flavor.

Companion Planting

Good Companions

Avoid Planting Near

  • Carrots
  • Parsnip

Check more plant combinations with our Companion Planting Checker →

🌱

Your Huron County Garden Planner — Free

A 22-page printable planner built for Huron County (Zone 6a). 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 Huron County, OH. Local conditions may vary. Last updated: July 2026.