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When to Plant Fennel in Coshocton County, OH

Florence fennel is grown for its swollen bulb-like stem base, which has a mild anise flavor. It is crisp raw in salads and sweet when roasted or braised.

Coshocton County, Ohio is in USDA Zone 5b. The average last spring frost is April 29 and the first fall frost is October 12, giving you a growing season of approximately 166 days.

At an elevation of 757 feet, Coshocton County receives approximately 30.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87ยฐF, providing good warmth for Fennel during the growing season.

Coshocton County, OH (Zone 5b) Moderate season
166 days
Last Spring Frost April 29
166 growing days
First Fall Frost October 12

Coshocton County Soil Profile

Soil Type

Silt Loam

Soil pH

6.1-7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (44 days to spare)
Start indoors: Mar 2 Transplant: May 11 🍅 Harvest: Jul 13 – Aug 24
Recommended (50%) ✓ Fits season (47 days to spare)
Start indoors: Mar 4 Transplant: May 13 🍅 Harvest: Jul 15 – Aug 26
Safe Start (90%) ✓ Fits season (42 days to spare)
Start indoors: Mar 22 Transplant: May 31 🍅 Harvest: Aug 2 – Sep 13

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 Coshocton County

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

Soil pH

Your soil pH (6.1โ€“7.0) is within Fennel's preferred range (5.5โ€“7.0).

Soil Texture

The silt loam soil in Coshocton County is excellent for Fennel โ€” good drainage, moisture retention, and nutrient holding capacity.

Drainage

Drainage is adequate for Fennel.

Organic Matter

Organic matter is excellent (4.0%) โ€” Fennel will thrive.

How to Plant Fennel

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

Succession Planting Fennel

3
successive plantings in your 166-day season

Sow every 6.9 weeks. Last sowing by Jul 14 to harvest before frost.

Plant Water Budget

Plant needs
0.6″/week
Rainfall provides
0.8″/week
You supply
0.0″/week
Watering frequency Only during dry spells
Season total 9 gal / 100 sq ft

Monthly Watering Guide for Fennel

Fennel needs approximately 0.6 inches of water per week (2.6" per month). Here's how your county's rainfall compares month by month.

Month Fennel Needs Rainfall You Supplement Action
Jan โ€” 1.4" 0" โ„๏ธ Dormant
Feb โ€” 1.2" 0" โ„๏ธ Dormant
Mar โ€” 2.3" 0" โ„๏ธ Dormant
Apr 2.6" 2.5" 0.1" ๐Ÿ’ง Light watering
May 2.6" 3.7" 0" โœ… Rainfall sufficient
Jun 2.6" 4.3" 0" โœ… Rainfall sufficient
Jul 2.6" 3" 0" โœ… Rainfall sufficient
Aug 2.6" 3.6" 0" โœ… Rainfall sufficient
Sep 2.6" 2.5" 0.1" ๐Ÿ’ง Light watering
Oct 2.6" 2.2" 0.4" ๐Ÿ’ง Light watering
Nov โ€” 2.1" 0" โ„๏ธ Dormant
Dec โ€” 1.7" 0" โ„๏ธ Dormant

Water needs are for active growing months only (Aprโ€“Oct in Coshocton County). Supplement amounts are based on average rainfall โ€” actual needs vary with temperature, soil, and mulching.

Fennel 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" โ€” every day above 50ยฐF 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.

Fennel needs ~1,144 GDD — county provides 2,531 GDD Excellent fit

Fennel Planting Timeline โ€” Coshocton County, OH

Fennel Planting Calendar

Activity When Date Range
Start Indoors March 4 Mar 4 โ€“ Mar 18
Transplant Outdoors May 13 May 13 โ€“ May 27
Direct Sow May 6 May 6 โ€“ May 27
Harvest July 15 Jul 15 โ€“ Aug 26

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

Month-by-Month Timeline

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

Growing Conditions

โ˜€๏ธ Sun

Full Sun (6-8+ hours)

๐Ÿ’ง Water

0.6"/week ยท Only during dry spells

๐Ÿ“… Days to Maturity

60โ€“90 days

๐Ÿงช Soil pH

Needs 5.5โ€“7 ยท Your soil: ideal

๐Ÿ—บ๏ธ USDA Zone

Zone 5b

๐Ÿ“† Growing Season

166 days in Coshocton County

Growing Tips for Fennel in Coshocton County

Direct sow Fennel outdoors after April 29 in Coshocton County when soil has warmed and frost danger has passed.

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

General growing tips

Direct sow in late summer for fall harvest to reduce bolting. Hill soil around bulbs as they enlarge. Harvest when bulbs are tennis-ball sized before they elongate.

Companion Planting

Good Companions

Avoid Planting Near

  • Tomatoes
  • Peppers
  • Beans

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Fennel in Coshocton County, OH?

Coshocton County is in Zone 5b with an average last frost of April 29. Plan your Fennel planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Coshocton County, OH?

Coshocton County, Ohio is in USDA Hardiness Zone 5b. The average last spring frost is April 29 and first fall frost is October 12.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Coshocton County gardeners in Zone 5b organize planting dates, track what's growing, and never miss a planting window.

Get Your Free Garden Planner →

Free download. Plan your entire garden season in minutes.

Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Coshocton County, OH. Local conditions may vary. Last updated: April 2026.