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When to Plant Thyme in McLennan County, TX

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.

McLennan County, Texas is in USDA Zone 8a. The average last spring frost is March 14 and the first fall frost is November 14, giving you a growing season of approximately 245 days.

At an elevation of 1,643 feet, McLennan County receives approximately 66 inches of rainfall annually with predominantly clay soil. Summer highs average 91Β°F, providing good warmth for Thyme during the growing season. Clay soil retains moisture well for Thyme, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Thyme root diseases.

McLennan County, TX (Zone 8a) Long season
245 days
Last Spring Frost March 14
245 growing days
First Fall Frost November 14

McLennan County Soil Profile

Soil Type

Clay

Soil pH

6.9-7.9

Drainage

Well Drained

Monthly Watering Guide for Thyme

Thyme needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.

Month Thyme Needs Rainfall You Supplement Action
Jan β€” 1.7" 0" ❄️ Dormant
Feb β€” 2" 0" ❄️ Dormant
Mar 4.3" 4.4" 0" βœ… Rainfall sufficient
Apr 4.3" 6.8" 0" βœ… Rainfall sufficient
May 4.3" 10.6" 0" βœ… Rainfall sufficient
Jun 4.3" 9.7" 0" βœ… Rainfall sufficient
Jul 4.3" 8.9" 0" βœ… Rainfall sufficient
Aug 4.3" 7.2" 0" βœ… Rainfall sufficient
Sep 4.3" 6.7" 0" βœ… Rainfall sufficient
Oct 4.3" 4" 0.3" πŸ’§ Light watering
Nov 4.3" 2.3" 2" πŸ’§ Light watering
Dec β€” 1.7" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in McLennan County). Supplement amounts are based on average rainfall β€” actual needs vary with temperature, soil, and mulching.

Thyme Planting Timeline β€” McLennan County, TX

Thyme Planting Calendar

Activity When Date Range
Transplant Outdoors March 21 Mar 21 – Apr 4
Harvest May 30 May 30 – Aug 1

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

Month-by-Month Timeline

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

Growing Conditions

β˜€οΈ Sun

Full Sun (6-8+ hours)

πŸ’§ Water

Low β€” drought tolerant

πŸ“… Days to Maturity

70–90 days

πŸ§ͺ Soil pH

Needs 6–8 Β· Your soil: N/A

πŸ—ΊοΈ USDA Zone

Zone 8a

πŸ“† Growing Season

245 days in McLennan County

Growing Tips for McLennan County

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 McLennan County, TX?

McLennan County is in Zone 8a with an average last frost of March 14. Plan your Thyme planting based on this frost date β€” see the calendar above for exact timing.

What planting zone is McLennan County, TX?

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

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Plan Your Garden with Confidence

Get our free Garden Planner β€” designed to help McLennan County gardeners in Zone 8a organize planting dates, track what's growing, and never miss a planting window.

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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 McLennan County, TX. Local conditions may vary. Last updated: April 2026.