Blog

When to Plant Thyme in Dawson County, TX

Dawson County, Texas Zone 8a May

This month in Dawson County, Texas

We've pulled the most time-sensitive tasks for Dawson County, Texas this May and put them front and centre. Tackle them in order.

Avg. last frost April 1
Avg. first frost November 10
Soil temp (4") 55°F
Watering Critical
Pest pressure Moderate
Daylight 13.7 hrs
Looking ahead to June
  • First harvests: thyme

Instant PDF download. No spam, unsubscribe any time.

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.

Dawson County, Texas is in USDA Zone 8a. The average last spring frost is April 1 and the first fall frost is November 10, giving you a growing season of approximately 223 days.

At an elevation of 4,748 feet, Dawson County receives approximately 46.1 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 102°F, so Thyme may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Thyme will need more frequent watering and organic matter to retain nutrients.

Dawson County, TX (Zone 8a) Long season
223 days
Last Spring Frost April 1
223 growing days
First Fall Frost November 10
Share this guide:

Dawson County Soil Profile

Soil Type

Sandy Loam

Soil pH

7.8-8.4

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (83 days to spare)
Transplant: Mar 31 🍅 Harvest: Jun 9 – Aug 11
Recommended (50%) ✓ Fits season (83 days to spare)
Transplant: Apr 8 🍅 Harvest: Jun 17 – Aug 19
Safe Start (90%) ✓ Fits season (77 days to spare)
Transplant: Apr 26 🍅 Harvest: Jul 5 – Sep 6

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 Dawson County

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

Soil pH

Your soil pH (7.8–8.4) is more alkaline than Thyme prefers (6.0–8.0). Add sulfur or peat moss to lower pH.

Soil Texture

Sandy soil in Dawson County warms quickly in spring but drains fast. Thyme will need more frequent watering and regular compost additions to retain nutrients.

Organic Matter

Organic matter is low (1.0%). Add 2-3 inches of compost before planting Thyme.

How to Plant Thyme

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

Succession Planting Thyme

3
successive plantings in your 223-day season

Sow every 8 weeks. Last sowing by Aug 12 to harvest before frost.

Plant Water Budget

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

Water stress score is 8/10 — consider drought-tolerant varieties and mulching

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 3.7" 0" ❄️ Dormant
Feb 2.7" 0" ❄️ Dormant
Mar 2.6" 0" ❄️ Dormant
Apr 1.3" 1.6" 0" ✅ Rainfall sufficient
May 1.3" 1" 0.3" 💧 Light watering
Jun 1.3" 1.9" 0" ✅ Rainfall sufficient
Jul 1.3" 7.4" 0" ✅ Rainfall sufficient
Aug 1.3" 9.2" 0" ✅ Rainfall sufficient
Sep 1.3" 5.9" 0" ✅ Rainfall sufficient
Oct 1.3" 4.2" 0" ✅ Rainfall sufficient
Nov 1.3" 2.8" 0" ✅ Rainfall sufficient
Dec 3" 0" ❄️ Dormant

Water needs are for active growing months only (Apr–Nov in Dawson 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 ~2,120 GDD — county provides 5,909 GDD Excellent fit

Thyme Planting Timeline — Dawson County, TX

Thyme Planting Calendar

Activity When Date Range
Transplant Outdoors April 8 Apr 8 – Apr 22
Harvest June 17 Jun 17 – Aug 19

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

Month-by-Month Timeline

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

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: too_alkaline

🗺️ USDA Zone

Zone 8a

📆 Growing Season

223 days in Dawson County

Growing Tips for Thyme in Dawson County

Direct sow Thyme outdoors after April 01 in Dawson County when soil has warmed and frost danger has passed.

Sandy soil in Dawson County dries quickly — mulch Thyme with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.

With summer highs reaching 102°F in Dawson County, provide afternoon shade for Thyme and water deeply in the morning.

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 Dawson County, TX?

Dawson County is in Zone 8a with an average last frost of April 1. Plan your Thyme planting based on this frost date — see the calendar above for exact timing.

What planting zone is Dawson County, TX?

Dawson County, Texas is in USDA Hardiness Zone 8a. The average last spring frost is April 1 and first fall frost is November 10.

🌱

Your Dawson County Garden Planner — Free

A 24-page printable planner built for Dawson 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.

Instant PDF download. No spam, unsubscribe any time.

Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Dawson 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.