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When to Plant Celery in Tioga County, PA

Tioga County, Pennsylvania Zone 6a May

Top priorities for Tioga County, Pennsylvania gardeners in May

A quick May briefing for Tioga County, Pennsylvania gardeners — what's urgent, what's next, and what can wait.

Avg. last frost May 13
Avg. first frost October 9
Soil temp (4") 59°F
Watering Low
Pest pressure Low
Daylight 14.4 hrs
  1. Move celery from tray to bed

    Frost risk is low now in Tioga County, Pennsylvania. If you've been covering beds overnight, you can stop.

A few tasks this May that'll pay off in June
  • Starting indoors: 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.

Tioga County, Pennsylvania is in USDA Zone 6a. The average last spring frost is May 13 and the first fall frost is October 9, giving you a growing season of approximately 149 days.

At an elevation of 74 feet, Tioga County receives approximately 44.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83°F, so choose short-season varieties of Celery to ensure they mature before fall.

Tioga County, PA (Zone 6a) Short season
149 days
Last Spring Frost May 13
149 growing days
First Fall Frost October 9

Tioga County Soil Profile

Soil Type

Silt Loam

Soil pH

4.8-6.4

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (13 days to spare)
Start indoors: Mar 29 Transplant: May 3 🍅 Harvest: Jul 26 – Sep 20
Recommended (50%) ✓ Fits season (9 days to spare)
Start indoors: Apr 8 Transplant: May 13 🍅 Harvest: Aug 5 – Sep 30
Safe Start (90%) ✓ Fits season (18 days to spare)
Start indoors: Apr 20 Transplant: May 25 🍅 Harvest: Aug 17 – Oct 12

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 Tioga County

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

Soil pH

Your soil pH (4.8–6.4) is more acidic than Celery prefers (6.0–7.0). Add garden lime to raise pH.

Soil Texture

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

Organic Matter

Organic matter is moderate (3.5%). 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 149-day season

Sow every 9.1 weeks. Last sowing by Jun 11 to harvest before frost.

For a dedicated fall crop, sow by Jul 31.

Plant Water Budget

Plant needs
1.3″/week
Rainfall provides
1.3″/week
You supply
0.0″/week
Watering frequency Only during dry spells
Season total 46 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 2.9" 0" ❄️ Dormant
Feb 3.2" 0" ❄️ Dormant
Mar 3.8" 0" ❄️ Dormant
Apr 3.6" 0" ❄️ Dormant
May 5.6" 4.2" 1.4" 💧 Light watering
Jun 5.6" 4.6" 1" 💧 Light watering
Jul 5.6" 4.2" 1.4" 💧 Light watering
Aug 5.6" 3.8" 1.8" 💧 Light watering
Sep 5.6" 3.7" 1.9" 💧 Light watering
Oct 5.6" 3.4" 2.2" 💧 Light watering
Nov 3.7" 0" ❄️ Dormant
Dec 3.8" 0" ❄️ Dormant

Water needs are for active growing months only (May–Oct in Tioga 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 ~1,225 GDD — county provides 1,825 GDD Excellent fit

Celery Planting Timeline — Tioga County, PA

Celery Planting Calendar

Activity When Date Range
Start Indoors April 8 Apr 8 – Apr 22
Transplant Outdoors May 13 May 13 – May 27
Direct Sow April 29 Apr 29 – May 20
Harvest August 5 Aug 5 – Sep 30
Fall Sowing July 31 Jul 31 – Aug 14

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

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1.3"/week · Only during dry spells

📅 Days to Maturity

80–120 days

🧪 Soil pH

Needs 6–7 · Your soil: too_acidic

🗺️ USDA Zone

Zone 6a

📆 Growing Season

149 days in Tioga County

Growing Tips for Celery in Tioga County

Direct sow Celery outdoors after May 13 in Tioga 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 →

Frequently Asked Questions

When should I plant Celery in Tioga County, PA?

Tioga County is in Zone 6a with an average last frost of May 13. Plan your Celery planting based on this frost date — see the calendar above for exact timing.

What planting zone is Tioga County, PA?

Tioga County, Pennsylvania is in USDA Hardiness Zone 6a. The average last spring frost is May 13 and first fall frost is October 9.

🌱

Your Tioga County Garden Planner — Free

A 24-page printable planner built for Tioga 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 Tioga 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.