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When to Plant Celery in Clay County, TX

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.

Clay County, Texas is in USDA Zone 7b. The average last spring frost is March 21 and the first fall frost is November 11, giving you a growing season of approximately 235 days.

At an elevation of 3,266 feet, Clay County receives approximately 64.3 inches of rainfall annually with predominantly loam soil. Summer highs average 91ยฐF, providing good warmth for Celery during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Celery root diseases.

Clay County, TX (Zone 7b) Long season
235 days
Last Spring Frost March 21
235 growing days
First Fall Frost November 11

Clay County Soil Profile

Soil Type

Loam

Soil pH

6.5-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (94 days to spare)
Start indoors: Feb 7 Transplant: Mar 14 🍅 Harvest: Jun 6 – Aug 1
Recommended (50%) ✓ Fits season (95 days to spare)
Start indoors: Feb 14 Transplant: Mar 21 🍅 Harvest: Jun 13 – Aug 8
Safe Start (90%) ✓ Fits season (85 days to spare)
Start indoors: Mar 11 Transplant: Apr 15 🍅 Harvest: Jul 8 – Sep 2

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.

Plant Water Budget

Plant needs
1.5″/week
Rainfall provides
1.2″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 734 gal / 100 sq ft
Celery needs ~1,825 GDD — county provides 4,288 GDD Excellent fit

Celery Planting Timeline โ€” Clay County, TX

Celery Planting Calendar

Activity When Date Range
Start Indoors February 14 Feb 14 โ€“ Feb 28
Transplant Outdoors March 21 Mar 21 โ€“ Apr 4
Direct Sow March 7 Mar 7 โ€“ Mar 28
Fall Sowing September 2 Sep 2 โ€“ Sep 16
Harvest June 13 Jun 13 โ€“ Aug 8

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

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

High โ€” keep soil consistently moist

Days to Maturity

80โ€“120 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 7b

Growing Season

235 days

Growing Tips for Clay County

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

Level Up Your Garden

Frequently Asked Questions

When should I plant Celery in Clay County, TX?

Clay County is in Zone 7b with an average last frost of March 21. Plan your Celery planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Clay County, TX?

Clay County, Texas is in USDA Hardiness Zone 7b. The average last spring frost is March 21 and first fall frost is November 11.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Clay County gardeners in Zone 7b organize planting dates, track what's growing, and never miss a planting window.

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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 Clay County, TX. Local conditions may vary. Last updated: April 2026.