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When to Plant Celery in Swisher 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.

Swisher County, Texas is in USDA Zone 7a. The average last spring frost is April 8 and the first fall frost is October 28, giving you a growing season of approximately 203 days.

At an elevation of 3,057 feet, Swisher County receives approximately 48.3 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 98ยฐF, so Celery may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring โ€” great for early planting โ€” but Celery will need more frequent watering and organic matter to retain nutrients.

Swisher County, TX (Zone 7a) Long season
203 days
Last Spring Frost April 8
203 growing days
First Fall Frost October 28

Swisher County Soil Profile

Soil Type

Sandy Loam

Soil pH

7.6-8.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (64 days to spare)
Start indoors: Feb 27 Transplant: Apr 3 🍅 Harvest: Jun 26 – Aug 21
Recommended (50%) ✓ Fits season (63 days to spare)
Start indoors: Mar 4 Transplant: Apr 8 🍅 Harvest: Jul 1 – Aug 26
Safe Start (90%) ✓ Fits season (72 days to spare)
Start indoors: Mar 16 Transplant: Apr 20 🍅 Harvest: Jul 13 – Sep 7

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
1.0″/week
You supply
0.6″/week
Watering frequency 1-2 times/week
Season total 1,086 gal / 100 sq ft
Drought risk

Water stress score is 8/10 โ€” consider drought-tolerant varieties and mulching

Celery needs ~2,350 GDD — county provides 4,770 GDD Excellent fit

Celery Planting Timeline โ€” Swisher County, TX

Celery Planting Calendar

Activity When Date Range
Start Indoors March 4 Mar 4 โ€“ Mar 18
Transplant Outdoors April 8 Apr 8 โ€“ Apr 22
Direct Sow March 25 Mar 25 โ€“ Apr 15
Fall Sowing August 19 Aug 19 โ€“ Sep 2
Harvest July 1 Jul 1 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 Direct Sow
April Transplant Outdoors Direct Sow
May โ€”
June โ€”
July Harvest
August Fall Sowing 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 7a

Growing Season

203 days

Growing Tips for Swisher 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 Swisher County, TX?

Swisher County is in Zone 7a with an average last frost of April 8. Plan your Celery planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Swisher County, TX?

Swisher County, Texas is in USDA Hardiness Zone 7a. The average last spring frost is April 8 and first fall frost is October 28.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Swisher County gardeners in Zone 7a 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 Swisher County, TX. Local conditions may vary. Last updated: April 2026.