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When to Plant Belgian Endive in Clarion County, PA

Clarion County, Pennsylvania Zone 6a May

May to-do list for Clarion County, Pennsylvania

We've pulled the most time-sensitive tasks for Clarion County, Pennsylvania this May and put them front and centre. Tackle them in order.

Avg. last frost May 9
Avg. first frost October 15
Soil temp (4") 57°F
Watering Moderate
Pest pressure Low
Daylight 14.3 hrs
  1. Set out belgian endive seedlings

    Water the tray well an hour before you transplant. Roots slide out cleanly and settle in faster.

Looking ahead to June
  • Starting indoors: belgian endive

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Belgian endive is produced by forcing chicory roots in darkness to create tight, pale, torpedo-shaped heads called chicons. They have a mild bitterness and elegant crunch.

Clarion County, Pennsylvania is in USDA Zone 6a. The average last spring frost is May 9 and the first fall frost is October 15, giving you a growing season of approximately 159 days.

At an elevation of 840 feet, Clarion County receives approximately 44.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84°F, so choose short-season varieties of Belgian Endive to ensure they mature before fall.

Clarion County, PA (Zone 6a) Moderate season
159 days
Last Spring Frost May 9
159 growing days
First Fall Frost October 15
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Clarion County Soil Profile

Soil Type

Silt Loam

Soil pH

4.8-6.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Start indoors: Mar 26 Transplant: Apr 30 🍅 Harvest: Aug 20 – Oct 15
Recommended (50%) ✗ May not fit
Start indoors: Apr 4 Transplant: May 9 🍅 Harvest: Aug 29 – Oct 24
Safe Start (90%) ✗ May not fit
Start indoors: Apr 21 Transplant: May 26 🍅 Harvest: Sep 15 – Nov 10

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 Clarion County

How your county's soil matches Belgian Endive's growing requirements.

Soil pH

Your soil pH (4.8–6.8) overlaps with Belgian Endive's range (5.5–7.0), though not a perfect match.

Soil Texture

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

Organic Matter

Organic matter is moderate (3.6%). Annual compost additions will help Belgian Endive.

How to Plant Belgian Endive

0.5"
Planting Depth
6"
Between Plants
12"
Between Rows

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

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
1.2″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft

Monthly Watering Guide for Belgian Endive

Belgian Endive needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.

Month Belgian Endive Needs Rainfall You Supplement Action
Jan 3" 0" ❄️ Dormant
Feb 3.5" 0" ❄️ Dormant
Mar 4" 0" ❄️ Dormant
Apr 3.8" 0" ❄️ Dormant
May 4.3" 3.7" 0.6" 💧 Light watering
Jun 4.3" 3.9" 0.4" 💧 Light watering
Jul 4.3" 4.7" 0" ✅ Rainfall sufficient
Aug 4.3" 3.9" 0.4" 💧 Light watering
Sep 4.3" 4.4" 0" ✅ Rainfall sufficient
Oct 4.3" 3.5" 0.8" 💧 Light watering
Nov 3.2" 0" ❄️ Dormant
Dec 3.3" 0" ❄️ Dormant

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

Belgian Endive 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.

Belgian Endive needs ~1,690 GDD — county provides 2,067 GDD Good fit

Belgian Endive Planting Timeline — Clarion County, PA

Belgian Endive Planting Calendar

Activity When Date Range
Start Indoors April 4 Apr 4 – Apr 18
Transplant Outdoors May 9 May 9 – May 23
Direct Sow April 25 Apr 25 – May 16
Harvest August 29 Aug 29 – Oct 24
Fall Sowing August 6 Aug 6 – Aug 20

Plant 0.5" deep · 6" apart · Rows 12" apart

Month-by-Month Timeline

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

☀️ Sun

Partial Shade (3-6 hours)

💧 Water

1"/week · Natural rainfall sufficient

📅 Days to Maturity

110–150 days

🧪 Soil pH

Needs 5.5–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 6a

📆 Growing Season

159 days in Clarion County

Growing Tips for Belgian Endive in Clarion County

Direct sow Belgian Endive outdoors after May 09 in Clarion County when soil has warmed and frost danger has passed.

Your 159.0-day growing season in Clarion County is tight for Belgian Endive (110.0-150.0 days to maturity). Start indoors and choose early-maturing varieties.

Common pests for Belgian Endive in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.

General growing tips

Grow chicory roots in the garden during summer, then dig in fall. Trim tops and force roots in moist sand in a dark cellar at 50-60F. Chicons emerge in 3-4 weeks.

Companion Planting

Good Companions

Avoid Planting Near

  • Fennel

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Belgian Endive in Clarion County, PA?

Clarion County is in Zone 6a with an average last frost of May 9. Plan your Belgian Endive planting based on this frost date — see the calendar above for exact timing.

What planting zone is Clarion County, PA?

Clarion County, Pennsylvania is in USDA Hardiness Zone 6a. The average last spring frost is May 9 and first fall frost is October 15.

🌱

Your Clarion County Garden Planner — Free

A 24-page printable planner built for Clarion 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 Clarion County, PA. Local conditions may vary. Last updated: May 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.