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When to Plant Thyme in Brown County, TX

Brown County, Texas Zone 8a May

May to-do list for Brown County, Texas

Each item below is timed to Brown County, Texas's frost dates and soil temperatures. Skip nothing, stress about nothing.

Avg. last frost March 22
Avg. first frost November 14
Soil temp (4") 60°F
Watering Low
Pest pressure High
Daylight 13.6 hrs
June will be here before you know it — start on
  • 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.

Brown County, Texas is in USDA Zone 8a. The average last spring frost is March 22 and the first fall frost is November 14, giving you a growing season of approximately 237 days.

At an elevation of 4,423 feet, Brown County receives approximately 55.4 inches of rainfall annually with predominantly loam soil. Summer highs average 96°F, so Thyme may need afternoon shade and extra watering during peak heat. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Thyme root diseases.

Brown County, TX (Zone 8a) Long season
237 days
Last Spring Frost March 22
237 growing days
First Fall Frost November 14
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Brown County Soil Profile

Soil Type

Loam

Soil pH

6.8-7.5

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (98 days to spare)
Transplant: Mar 16 🍅 Harvest: May 25 – Jul 27
Recommended (50%) ✓ Fits season (97 days to spare)
Transplant: Mar 29 🍅 Harvest: Jun 7 – Aug 9
Safe Start (90%) ✓ Fits season (95 days to spare)
Transplant: Apr 20 🍅 Harvest: Jun 29 – Aug 31

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 Brown County

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

Soil pH

Your soil pH (6.8–7.5) is within Thyme's preferred range (6.0–8.0).

Soil Texture

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

Organic Matter

Organic matter is moderate (2.1%). Annual compost additions will help Thyme.

How to Plant Thyme

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

Succession Planting Thyme

3
successive plantings in your 237-day season

Sow every 8 weeks. Last sowing by Aug 16 to harvest before frost.

Plant Water Budget

Plant needs
0.3″/week
Rainfall provides
1.0″/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 1.6" 0" ❄️ Dormant
Feb 1.6" 0" ❄️ Dormant
Mar 1.3" 3.8" 0" ✅ Rainfall sufficient
Apr 1.3" 5.9" 0" ✅ Rainfall sufficient
May 1.3" 7.8" 0" ✅ Rainfall sufficient
Jun 1.3" 8.3" 0" ✅ Rainfall sufficient
Jul 1.3" 7.4" 0" ✅ Rainfall sufficient
Aug 1.3" 7.3" 0" ✅ Rainfall sufficient
Sep 1.3" 5.4" 0" ✅ Rainfall sufficient
Oct 1.3" 3.1" 0" ✅ Rainfall sufficient
Nov 1.3" 1.7" 0" ✅ Rainfall sufficient
Dec 1.6" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in Brown 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 ~1,760 GDD — county provides 5,214 GDD Excellent fit

Thyme Planting Timeline — Brown County, TX

Thyme Planting Calendar

Activity When Date Range
Transplant Outdoors March 29 Mar 29 – Apr 12
Harvest June 7 Jun 7 – Aug 9

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

Month-by-Month Timeline

MonthActivities
January
February
March Transplant Outdoors
April Transplant Outdoors
May
June Harvest
July Harvest
August Harvest
September
October
November
December
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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 8a

📆 Growing Season

237 days in Brown County

Growing Tips for Thyme in Brown County

Direct sow Thyme outdoors after March 22 in Brown County when soil has warmed and frost danger has passed.

With summer highs reaching 96°F in Brown County, provide afternoon shade for Thyme and water deeply in the morning.

With 55" of annual rainfall in Brown 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 →

Frequently Asked Questions

When should I plant Thyme in Brown County, TX?

Brown County is in Zone 8a with an average last frost of March 22. Plan your Thyme planting based on this frost date — see the calendar above for exact timing.

What planting zone is Brown County, TX?

Brown County, Texas is in USDA Hardiness Zone 8a. The average last spring frost is March 22 and first fall frost is November 14.

🌱

Your Brown County Garden Planner — Free

A 24-page printable planner built for Brown County (Zone 8a). 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 Brown County, TX. Local conditions may vary. Last updated: May 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.