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When to Plant Celery in Hidalgo 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.

Hidalgo County, Texas is in USDA Zone 9b. The average last spring frost is February 6 and the first fall frost is December 18, giving you a growing season of approximately 315 days.

At an elevation of 4,081 feet, Hidalgo County receives approximately 67 inches of rainfall annually with predominantly loam soil. Summer highs average 100ยฐF, so Celery may need afternoon shade and extra watering during peak heat. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Celery root diseases.

Hidalgo County, TX (Zone 9b) Year-round
315 days
Last Spring Frost February 6
315 growing days
First Fall Frost December 18

Hidalgo County Soil Profile

Soil Type

Loam

Soil pH

6.2-7.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (188 days to spare)
Start indoors: Dec 21 Transplant: Jan 18 🍅 Harvest: Apr 12 – Jun 7
Recommended (50%) ✓ Fits season (175 days to spare)
Start indoors: Jan 9 Transplant: Feb 6 🍅 Harvest: May 1 – Jun 26
Safe Start (90%) ✓ Fits season (155 days to spare)
Start indoors: Feb 5 Transplant: Mar 5 🍅 Harvest: May 28 – Jul 23

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 Hidalgo County

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

Soil pH

Your soil pH (6.2โ€“7.8) overlaps with Celery's range (6.0โ€“7.0), though not a perfect match.

Soil Texture

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

Organic Matter

Organic matter is moderate (2.3%). Annual compost additions will help Celery.

How to Plant Celery

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

Fall planting: Sow 8 weeks before your first frost date for a fall harvest.

Succession Planting Celery

4
successive plantings in your 315-day season

Sow every 9.1 weeks. Last sowing by Aug 20 to harvest before frost.

For a dedicated fall crop, sow by Oct 23.

Plant Water Budget

Plant needs
1.3″/week
Rainfall provides
0.9″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 1,152 gal / 100 sq ft
Celery needs ~2,500 GDD — county provides 7,900 GDD Excellent fit

Celery Planting Timeline โ€” Hidalgo County, TX

Celery Planting Calendar

Activity When Date Range
Start Indoors January 9 Jan 9 โ€“ Jan 23
Transplant Outdoors February 6 Feb 6 โ€“ Feb 20
Direct Sow January 16 Jan 16 โ€“ Feb 6
Fall Sowing October 23 Oct 23 โ€“ Nov 6
Harvest May 1 May 1 โ€“ Jun 26

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

Month-by-Month Timeline

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

Growing Conditions

โ˜€๏ธ Sun

Full Sun (6-8+ hours)

๐Ÿ’ง Water

1.3"/week ยท 1-2 times/week

๐Ÿ“… Days to Maturity

80โ€“120 days

๐Ÿงช Soil pH

Needs 6โ€“7 ยท Your soil: acceptable

๐Ÿ—บ๏ธ USDA Zone

Zone 9b

๐Ÿ“† Growing Season

315 days in Hidalgo County

Growing Tips for Celery in Hidalgo County

Direct sow Celery outdoors after February 06 in Hidalgo County when soil has warmed and frost danger has passed.

With summer highs reaching 100ยฐF in Hidalgo County, provide afternoon shade for Celery and water deeply in the morning.

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

Level Up Your Garden

Frequently Asked Questions

When should I plant Celery in Hidalgo County, TX?

Hidalgo County is in Zone 9b with an average last frost of February 6. Plan your Celery planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Hidalgo County, TX?

Hidalgo County, Texas is in USDA Hardiness Zone 9b. The average last spring frost is February 6 and first fall frost is December 18.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Hidalgo County gardeners in Zone 9b 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 Hidalgo County, TX. Local conditions may vary. Last updated: April 2026.