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When to Plant Thyme in Northumberland County, VA

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.

Northumberland County, Virginia is in USDA Zone 7b. The average last spring frost is April 5 and the first fall frost is November 4, giving you a growing season of approximately 213 days.

At an elevation of 207 feet, Northumberland County receives approximately 54.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 92ยฐF, providing good warmth for Thyme during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Thyme root diseases.

Northumberland County, VA (Zone 7b) Long season
213 days
Last Spring Frost April 5
213 growing days
First Fall Frost November 4

Northumberland County Soil Profile

Soil Type

Silt Loam

Soil pH

5.4-7.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (76 days to spare)
Transplant: Apr 4 🍅 Harvest: Jun 13 – Aug 15
Recommended (50%) ✓ Fits season (73 days to spare)
Transplant: Apr 12 🍅 Harvest: Jun 21 – Aug 23
Safe Start (90%) ✓ Fits season (86 days to spare)
Transplant: May 3 🍅 Harvest: Jul 12 – Sep 13

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
1.1″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Thyme needs ~1,520 GDD — county provides 4,047 GDD Excellent fit

Thyme Planting Timeline โ€” Northumberland County, VA

Thyme Planting Calendar

Activity When Date Range
Transplant Outdoors April 12 Apr 12 โ€“ Apr 26
Harvest June 21 Jun 21 โ€“ Aug 23

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
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

213 days

Growing Tips for Northumberland 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 Northumberland County, VA?

Northumberland County is in Zone 7b with an average last frost of April 5. Plan your Thyme planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Northumberland County, VA?

Northumberland County, Virginia is in USDA Hardiness Zone 7b. The average last spring frost is April 5 and first fall frost is November 4.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Northumberland 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 Northumberland County, VA. Local conditions may vary. Last updated: April 2026.