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When to Plant Thyme in Cotulla, TX

Thyme
Cotulla, TX Zone 9a June

Top priorities for Cotulla, TX gardeners in June

June is a pivotal month for Cotulla, TX gardens. Focus on these tasks first and you'll set up the rest of the season for success.

Avg. last frost February 14
Avg. first frost December 3
Soil temp (4") 80°F
Watering Low
Pest pressure High
Daylight 13.8 hrs
  1. Basket week: thyme

    Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.

Before July arrives, get these ready
  • First harvests: thyme

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Thyme is a low-growing perennial herb with tiny, aromatic leaves and a warm, earthy flavor. It is one of the most versatile culinary and medicinal herbs.

Cotulla, Texas is in USDA Zone 9a. The average last spring frost is February 14 and the first fall frost is December 3, giving you a growing season of approximately 292 days.

At an elevation of 2,270 feet, La Salle County receives approximately 57.2 inches of rainfall annually with predominantly loam soil. Summer highs average 92°F, providing good warmth for Thyme during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Thyme root diseases.

Cotulla, TX (Zone 9a) Year-round
292 days
Last Spring Frost February 14
292 growing days
First Fall Frost December 3

Cotulla Soil Profile

Soil Type

Loam

Soil pH

6.5-7.6

Drainage

Well Drained

Thyme Planting Risk Windows

Early Start (70% safe) ✓ Fits season (160 days to spare)
Transplant: Feb 6 🍅 Harvest: Apr 17 – Jun 19
Recommended (50%) ✓ Fits season (152 days to spare)
Transplant: Feb 21 🍅 Harvest: May 2 – Jul 4
Safe Start (90%) ✓ Fits season (141 days to spare)
Transplant: Mar 21 🍅 Harvest: May 30 – Aug 1

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 Cotulla

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

Soil pH

Your soil pH (6.5–7.6) is within Thyme's preferred range (6.0–8.0).

Soil Texture

The loam soil in La Salle County is excellent for Thyme — good drainage, moisture retention, and nutrient holding capacity.

Drainage

Drainage is adequate for Thyme.

Organic Matter

Organic matter is moderate (2.0%). Annual compost additions will help Thyme.

How to Plant Thyme

0.5"
Planting Depth
8"
Between Plants
12"
Between Rows

Succession Planting Thyme

4
successive plantings in your 292-day season

Sow every 8 weeks. Last sowing by Sep 04 to harvest before frost.

Thyme Water Budget

Plant needs
0.3″/week
Rainfall provides
0.8″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft

Monthly Watering Guide for Thyme

Thyme needs approximately 0.3 inches of water per week (1.3" per month). Here's how your county's rainfall compares month by month.

Month Thyme Needs Rainfall You Supplement Action
Jan 1.5" 0" ❄️ Dormant
Feb 1.3" 2" 0" ✅ Rainfall sufficient
Mar 1.3" 3.4" 0" ✅ Rainfall sufficient
Apr 1.3" 5.5" 0" ✅ Rainfall sufficient
May 1.3" 7.4" 0" ✅ Rainfall sufficient
Jun 1.3" 10.2" 0" ✅ Rainfall sufficient
Jul 1.3" 7.3" 0" ✅ Rainfall sufficient
Aug 1.3" 7" 0" ✅ Rainfall sufficient
Sep 1.3" 5.8" 0" ✅ Rainfall sufficient
Oct 1.3" 3.6" 0" ✅ Rainfall sufficient
Nov 1.3" 2" 0" ✅ Rainfall sufficient
Dec 1.3" 1.6" 0" ✅ Rainfall sufficient

Water needs are for active growing months only (Feb–Dec in La Salle County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Thyme Heat Requirements (GDD)

What are Growing Degree Days (GDD)?

Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.

Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.

Thyme needs ~1,520 GDD — county provides 5,567 GDD Excellent fit

Thyme Planting Timeline — Cotulla, TX

Thyme Planting Calendar

Activity When Date Range
Transplant Outdoors February 21 Feb 21 – Mar 7
Harvest May 2 May 2 – Jul 4

Plant 0.5" deep · 8" apart · Rows 12" apart

Month-by-Month Timeline

MonthActivities
January
February Transplant Outdoors
March Transplant Outdoors
April
May Harvest
June Harvest
July Harvest
August
September
October
November
December

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.3"/week · Natural rainfall sufficient

📅 Days to Maturity

70–90 days

🧪 Soil pH

Needs 6–8 · Your soil: ideal

🗺️ USDA Zone

Zone 9a

📆 Growing Season

292 days in La Salle County

Growing Tips for Thyme in Cotulla

Direct sow Thyme outdoors after February 14 in La Salle County when soil has warmed and frost danger has passed.

With 57" of annual rainfall in La Salle County, ensure good drainage for Thyme — excess moisture can promote root rot and fungal diseases.

General growing tips

Start from seed, cuttings, or divisions. Plant in well-drained, lean soil. Prune lightly after flowering. Replace plants every 3-4 years when they become woody.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

🌱

Your La Salle County Garden Planner — Free

A 22-page printable planner built for La Salle County (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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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 La Salle County, TX. Local conditions may vary. Last updated: June 2026.