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When to Plant Cauliflower in Dimmit County, TX

Cauliflower is a cool-season brassica that produces dense white, purple, or green heads called curds. It is more finicky than broccoli but rewards with a mild, nutty flavor.

Dimmit County, Texas is in USDA Zone 8b. The average last spring frost is February 26 and the first fall frost is December 1, giving you a growing season of approximately 278 days.

At an elevation of 2,638 feet, Dimmit County receives approximately 63.2 inches of rainfall annually with predominantly loam soil. Summer highs average 94ยฐF, providing good warmth for Cauliflower during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Cauliflower root diseases.

Dimmit County, TX (Zone 8b) Year-round
278 days
Last Spring Frost February 26
278 growing days
First Fall Frost December 1

Dimmit County Soil Profile

Soil Type

Loam

Soil pH

6.5-7.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (162 days to spare)
Start indoors: Jan 9 Transplant: Feb 13 🍅 Harvest: Apr 10 – Jun 12
Recommended (50%) ✓ Fits season (159 days to spare)
Start indoors: Jan 22 Transplant: Feb 26 🍅 Harvest: Apr 23 – Jun 25
Safe Start (90%) ✓ Fits season (153 days to spare)
Start indoors: Feb 15 Transplant: Mar 22 🍅 Harvest: May 17 – Jul 19

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 Dimmit County

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

Soil pH

Your soil pH (6.5โ€“7.3) overlaps with Cauliflower's range (6.0โ€“7.0), though not a perfect match.

Soil Texture

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

Organic Matter

Organic matter is moderate (2.4%). Annual compost additions will help Cauliflower.

How to Plant Cauliflower

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 Cauliflower

6
successive plantings in your 278-day season

Sow every 6.3 weeks. Last sowing by Aug 23 to harvest before frost.

For a dedicated fall crop, sow by Sep 22.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
1.0″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 121 gal / 100 sq ft
Cauliflower needs ~1,589 GDD — county provides 5,719 GDD Excellent fit

Cauliflower Planting Timeline โ€” Dimmit County, TX

Cauliflower Planting Calendar

Activity When Date Range
Start Indoors January 22 Jan 22 โ€“ Feb 5
Transplant Outdoors February 26 Feb 26 โ€“ Mar 12
Direct Sow February 12 Feb 12 โ€“ Mar 5
Fall Sowing September 22 Sep 22 โ€“ Oct 6
Harvest April 23 Apr 23 โ€“ Jun 25

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

Month-by-Month Timeline

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

Growing Conditions

โ˜€๏ธ Sun

Full Sun (6-8+ hours)

๐Ÿ’ง Water

1"/week ยท Only during dry spells

๐Ÿ“… Days to Maturity

55โ€“100 days

๐Ÿงช Soil pH

Needs 6โ€“7 ยท Your soil: acceptable

๐Ÿ—บ๏ธ USDA Zone

Zone 8b

๐Ÿ“† Growing Season

278 days in Dimmit County

Growing Tips for Cauliflower in Dimmit County

Direct sow Cauliflower outdoors after February 26 in Dimmit County when soil has warmed and frost danger has passed.

Summer highs in Dimmit County reach 94ยฐF โ€” grow Cauliflower as a spring or fall crop. Use shade cloth if planting in summer.

Common pests for Cauliflower in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.

General growing tips

Start seeds indoors 6 weeks before transplanting. Blanch white varieties by tying outer leaves over the head. Provide consistent moisture and avoid temperature extremes.

Companion Planting

Good Companions

Avoid Planting Near

  • Tomatoes
  • Strawberries

Level Up Your Garden

Frequently Asked Questions

When should I plant Cauliflower in Dimmit County, TX?

Dimmit County is in Zone 8b with an average last frost of February 26. Plan your Cauliflower planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Dimmit County, TX?

Dimmit County, Texas is in USDA Hardiness Zone 8b. The average last spring frost is February 26 and first fall frost is December 1.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Dimmit County gardeners in Zone 8b 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 Dimmit County, TX. Local conditions may vary. Last updated: April 2026.