When to plant Thyme in Issue, MD
Issue's short 230-day growing season means one Thyme planting between April 5 and April 19. No fall crop in Zone 7b.
When to Plant Thyme in Issue, MD
Charles County, Maryland gardeners: here's your July plan
Here's what deserves your attention in Charles County, Maryland this month. Everything below is tailored to Zone 7b and timed around your local frost dates.
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Pick thyme
Check every 1–2 days. Many of these get tough or go to seed if you wait too long.
August prep starts now
- First harvests: thyme
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.
Issue, Maryland is in USDA Zone 7b. The average last spring frost is March 29 and the first fall frost is November 14, giving you a growing season of approximately 230 days.
At an elevation of 382 feet, Charles County receives approximately 38.3 inches of rainfall annually with predominantly silt loam soil. Summer highs average 91°F, providing good warmth for Thyme during the growing season.
Issue Soil Profile
Soil Type
Silt Loam
Soil pH
5.7-6.8
Drainage
Well Drained
Thyme Planting Risk Windows
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 Issue
How your county's soil matches Thyme's growing requirements.
Soil pH
Your soil pH (5.7–6.8) overlaps with Thyme's range (6.0–8.0), though not a perfect match.
Soil Texture
The silt loam soil in Charles County is excellent for Thyme — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.6%). Annual compost additions will help Thyme.
How to Plant Thyme
Succession Planting Thyme
Sow every 8 weeks. Last sowing by Aug 16 to harvest before frost.
Thyme Water Budget
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" | 0" | ❄️ Dormant |
| Feb | — | 2.8" | 0" | ❄️ Dormant |
| Mar | 1.3" | 3.2" | 0" | ✅ Rainfall sufficient |
| Apr | 1.3" | 3.1" | 0" | ✅ Rainfall sufficient |
| May | 1.3" | 3.4" | 0" | ✅ Rainfall sufficient |
| Jun | 1.3" | 3.4" | 0" | ✅ Rainfall sufficient |
| Jul | 1.3" | 4" | 0" | ✅ Rainfall sufficient |
| Aug | 1.3" | 3.8" | 0" | ✅ Rainfall sufficient |
| Sep | 1.3" | 3.4" | 0" | ✅ Rainfall sufficient |
| Oct | 1.3" | 2.9" | 0" | ✅ Rainfall sufficient |
| Nov | 1.3" | 2.8" | 0" | ✅ Rainfall sufficient |
| Dec | — | 2.6" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Charles 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 Planting Timeline — Issue, MD
Thyme Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 5 | Apr 5 – Apr 19 |
| Harvest | June 14 | Jun 14 – Aug 16 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Transplant Outdoors |
| May | — |
| June | Harvest |
| July | Harvest |
| August | Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
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: acceptable
🗺️ USDA Zone
Zone 7b
📆 Growing Season
230 days in Charles County
Growing Tips for Thyme in Issue
Direct sow Thyme outdoors after March 29 in Charles County when soil has warmed and frost danger has passed.
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 →
Thyme in Other Locations
When should I plant Thyme in Issue, MD?
In Issue, MD, plant Thyme after the last frost (around March 29) and before the first frost (around November 14). Best results when soil holds above 50°F.
What growing zone is Issue, MD for Thyme?
Issue sits in USDA Zone 7b. Thyme grows reliably in zones 4a through 9b, so it's a good fit here.
Can Thyme grow in Issue's climate?
Yes — Thyme grows well in Issue's temperate climate. Issue averages a 230-day frost-free season, with last frost around March 29 and first frost around November 14.
Your Charles County Garden Planner — Free
A 22-page printable planner built for Charles County (Zone 7b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.