When to Plant Thyme in Simpson County, MS
Simpson County, Mississippi gardeners: here's your May plan
Your Simpson County, Mississippi garden is entering a new phase. Here's what's on the schedule for May and why each task matters now.
-
Bring in the thyme
The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.
June will be here before you know it — start on
- 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.
Simpson County, Mississippi is in USDA Zone 8b. The average last spring frost is March 10 and the first fall frost is November 15, giving you a growing season of approximately 250 days.
At an elevation of 90 feet, Simpson County receives approximately 48.4 inches of rainfall annually with predominantly clay loam soil. Summer highs average 97°F, so Thyme may need afternoon shade and extra watering during peak heat. Clay soil retains moisture well for Thyme, but amend with compost to improve drainage and prevent root rot.
Simpson County Soil Profile
Soil Type
Clay Loam
Soil pH
5.6-6.8
Drainage
Well Drained
Plant 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 Simpson County
How your county's soil matches Thyme's growing requirements.
Soil pH
Your soil pH (5.6–6.8) overlaps with Thyme's range (6.0–8.0), though not a perfect match.
Soil Texture
The clay loam soil in Simpson County is excellent for Thyme — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.2%). Annual compost additions will help Thyme.
How to Plant Thyme
Succession Planting Thyme
Sow every 8 weeks. Last sowing by Aug 17 to harvest before frost.
Plant Water Budget
Water stress score is 6/10 — 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 | — | 4.3" | 0" | ❄️ Dormant |
| Feb | — | 4" | 0" | ❄️ Dormant |
| Mar | 1.3" | 4.3" | 0" | ✅ Rainfall sufficient |
| Apr | 1.3" | 3.9" | 0" | ✅ Rainfall sufficient |
| May | 1.3" | 4.1" | 0" | ✅ Rainfall sufficient |
| Jun | 1.3" | 4.9" | 0" | ✅ Rainfall sufficient |
| Jul | 1.3" | 4.8" | 0" | ✅ Rainfall sufficient |
| Aug | 1.3" | 4.1" | 0" | ✅ Rainfall sufficient |
| Sep | 1.3" | 3.9" | 0" | ✅ Rainfall sufficient |
| Oct | 1.3" | 2.9" | 0" | ✅ Rainfall sufficient |
| Nov | 1.3" | 3.4" | 0" | ✅ Rainfall sufficient |
| Dec | — | 3.7" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Simpson 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 — Simpson County, MS
Thyme Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | March 17 | Mar 17 – Mar 31 |
| Harvest | May 26 | May 26 – Jul 28 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Transplant Outdoors |
| April | — |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | — |
| 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 8b
📆 Growing Season
250 days in Simpson County
Growing Tips for Thyme in Simpson County
Direct sow Thyme outdoors after March 10 in Simpson County when soil has warmed and frost danger has passed.
With Simpson County's clay soil (32% clay), work in 3-4 inches of compost before planting Thyme. Avoid tilling when soil is wet to prevent compaction.
With summer highs reaching 97°F in Simpson 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 →
Thyme in Other Locations
Frequently Asked Questions
When should I plant Thyme in Simpson County, MS?
Simpson County is in Zone 8b with an average last frost of March 10. Plan your Thyme planting based on this frost date — see the calendar above for exact timing.
What planting zone is Simpson County, MS?
Simpson County, Mississippi is in USDA Hardiness Zone 8b. The average last spring frost is March 10 and first fall frost is November 15.
Your Simpson County Garden Planner — Free
A 24-page printable planner built for Simpson County (Zone 8b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.