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When to Plant Thyme in Grant County, AR

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.

Grant County, Arkansas is in USDA Zone 7b. The average last spring frost is March 20 and the first fall frost is November 11, giving you a growing season of approximately 236 days.

At an elevation of 498 feet, Grant County receives approximately 51.2 inches of rainfall annually with predominantly silt loam soil. Summer highs average 94ยฐF, providing good warmth for Thyme during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Thyme root diseases.

Grant County, AR (Zone 7b) Long season
236 days
Last Spring Frost March 20
236 growing days
First Fall Frost November 11

Grant County Soil Profile

Soil Type

Silt Loam

Soil pH

5.3-6.6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (94 days to spare)
Transplant: Mar 20 🍅 Harvest: May 29 – Jul 31
Recommended (50%) ✓ Fits season (96 days to spare)
Transplant: Mar 27 🍅 Harvest: Jun 5 – Aug 7
Safe Start (90%) ✓ Fits season (94 days to spare)
Transplant: Apr 16 🍅 Harvest: Jun 25 – Aug 27

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.

Plant Water Budget

Plant needs
0.5″/week
Rainfall provides
0.9″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Thyme needs ~1,640 GDD — county provides 4,838 GDD Excellent fit

Thyme Planting Timeline โ€” Grant County, AR

Thyme Planting Calendar

Activity When Date Range
Transplant Outdoors March 27 Mar 27 โ€“ Apr 10
Harvest June 5 Jun 5 โ€“ Aug 7

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

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Low โ€” drought tolerant

Days to Maturity

70โ€“90 days

Soil pH

6 โ€“ 8

USDA Zone

Zone 7b

Growing Season

236 days

Growing Tips for Grant 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

Level Up Your Garden

Frequently Asked Questions

When should I plant Thyme in Grant County, AR?

Grant County is in Zone 7b with an average last frost of March 20. Plan your Thyme planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Grant County, AR?

Grant County, Arkansas is in USDA Hardiness Zone 7b. The average last spring frost is March 20 and first fall frost is November 11.

๐ŸŒฑ

Plan Your Garden with Confidence

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