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When to Plant Lettuce in Runnels County, TX

Lettuce is a fast-growing cool-season green available in leaf, romaine, butterhead, and crisphead types. It is the foundation of salads and one of the easiest crops to grow.

Runnels County, Texas is in USDA Zone 7b. The average last spring frost is March 19 and the first fall frost is November 15, giving you a growing season of approximately 241 days.

At an elevation of 4,833 feet, Runnels County receives approximately 47.6 inches of rainfall annually with predominantly loam soil. Summer highs average 90ยฐF, providing good warmth for Lettuce during the growing season.

Runnels County, TX (Zone 7b) Long season
241 days
Last Spring Frost March 19
241 growing days
First Fall Frost November 15

Runnels County Soil Profile

Soil Type

Loam

Soil pH

6.3-7.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (140 days to spare)
Start indoors: Feb 2 Transplant: Mar 9 🍅 Harvest: Apr 13 – Jun 22
Recommended (50%) ✓ Fits season (136 days to spare)
Start indoors: Feb 12 Transplant: Mar 19 🍅 Harvest: Apr 23 – Jul 2
Safe Start (90%) ✓ Fits season (128 days to spare)
Start indoors: Mar 8 Transplant: Apr 12 🍅 Harvest: May 17 – Jul 26

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 Runnels County

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

Soil pH

Your soil pH (6.3โ€“7.1) overlaps with Lettuce's range (6.0โ€“7.0), though not a perfect match.

Soil Texture

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

Organic Matter

Organic matter is low (2.0%). Add 2-3 inches of compost before planting Lettuce.

How to Plant Lettuce

0.5"
Planting Depth
6"
Between Plants
12"
Between Rows

Fall planting: Sow 10 weeks before your first frost date for a fall harvest.

Succession Planting Lettuce

9
successive plantings in your 241-day season

Sow every 3.4 weeks. Last sowing by Sep 16 to harvest before frost.

For a dedicated fall crop, sow by Sep 06.

Plant Water Budget

Plant needs
0.7″/week
Rainfall provides
0.8″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Lettuce needs ~788 GDD — county provides 4,217 GDD Excellent fit

Lettuce Planting Timeline โ€” Runnels County, TX

Lettuce Planting Calendar

Activity When Date Range
Start Indoors February 12 Feb 12 โ€“ Feb 26
Transplant Outdoors March 19 Mar 19 โ€“ Apr 2
Direct Sow March 5 Mar 5 โ€“ Mar 26
Fall Sowing September 6 Sep 6 โ€“ Sep 20
Harvest April 23 Apr 23 โ€“ Jul 2

Plant 0.5" deep ยท 6" apart ยท Rows 12" apart

Month-by-Month Timeline

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

Growing Conditions

โ˜€๏ธ Sun

Partial Shade (3-6 hours)

๐Ÿ’ง Water

0.7"/week ยท Natural rainfall sufficient

๐Ÿ“… Days to Maturity

30โ€“60 days

๐Ÿงช Soil pH

Needs 6โ€“7 ยท Your soil: acceptable

๐Ÿ—บ๏ธ USDA Zone

Zone 7b

๐Ÿ“† Growing Season

241 days in Runnels County

Growing Tips for Lettuce in Runnels County

Direct sow Lettuce outdoors after March 19 in Runnels County when soil has warmed and frost danger has passed.

Your generous 241.0-day season in Runnels County allows multiple plantings of Lettuce. Sow every 15.0 days for continuous harvest.

Common pests for Lettuce in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.

General growing tips

Sow seeds directly every 2 weeks for continuous harvest. Provide afternoon shade in warm weather to delay bolting. Harvest in the morning for crispest leaves.

Recommended Lettuce Varieties for Runnels County

Bolt-resistant varieties for warm summers โ€” grow as spring/fall crop

Jericho Muir Nevada New Red Fire

Companion Planting

Good Companions

Avoid Planting Near

  • Celery

Level Up Your Garden

๐ŸŒพ Save Your Own Lettuce Seeds
Life Cycle Annual
Pollination Self-Pollinating
How to Collect Let plants bolt and flower. Harvest seed heads when fluffy.
Storage Store airtight; viable 6 years at 35ยฐF, under 45% humidity.

Very easy to save. Let a few plants bolt each season.

Frequently Asked Questions

When should I plant Lettuce in Runnels County, TX?

Runnels County is in Zone 7b with an average last frost of March 19. Plan your Lettuce planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Runnels County, TX?

Runnels County, Texas is in USDA Hardiness Zone 7b. The average last spring frost is March 19 and first fall frost is November 15.

๐ŸŒฑ

Plan Your Garden with Confidence

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