When to Plant Rosemary in Richmond County, GA
Your May game plan for Richmond County, Georgia
May is a pivotal month for Richmond County, Georgia gardens. Focus on these tasks first and you'll set up the rest of the season for success.
Coming up in June — start thinking about
- First harvests: rosemary
Rosemary is an aromatic evergreen shrub with needle-like leaves and a piney, citrus flavor. It is a Mediterranean herb that thrives in warm, dry conditions.
Richmond County, Georgia is in USDA Zone 8b. The average last spring frost is March 23 and the first fall frost is November 7, giving you a growing season of approximately 229 days.
At an elevation of 82 feet, Richmond County receives approximately 52.7 inches of rainfall annually with predominantly clay loam soil. Summer highs average 96°F, so Rosemary may need afternoon shade and extra watering during peak heat. Clay soil retains moisture well for Rosemary, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Rosemary root diseases.
Richmond County Soil Profile
Soil Type
Clay Loam
Soil pH
5.7-6.4
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 Richmond County
How your county's soil matches Rosemary's growing requirements.
Soil pH
Your soil pH (5.7–6.4) overlaps with Rosemary's range (6.0–7.5), though not a perfect match.
Soil Texture
The clay loam soil in Richmond County is excellent for Rosemary — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.2%). Annual compost additions will help Rosemary.
How to Plant Rosemary
Succession Planting Rosemary
Sow every 9.1 weeks. Last sowing by May 11 to harvest before frost.
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Rosemary
Rosemary 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 | Rosemary Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4.8" | 0" | ❄️ Dormant |
| Feb | — | 3.6" | 0" | ❄️ Dormant |
| Mar | 1.3" | 5.6" | 0" | ✅ Rainfall sufficient |
| Apr | 1.3" | 3.5" | 0" | ✅ Rainfall sufficient |
| May | 1.3" | 4.2" | 0" | ✅ Rainfall sufficient |
| Jun | 1.3" | 5" | 0" | ✅ Rainfall sufficient |
| Jul | 1.3" | 4.7" | 0" | ✅ Rainfall sufficient |
| Aug | 1.3" | 5.7" | 0" | ✅ Rainfall sufficient |
| Sep | 1.3" | 3.8" | 0" | ✅ Rainfall sufficient |
| Oct | 1.3" | 3.3" | 0" | ✅ Rainfall sufficient |
| Nov | 1.3" | 3.7" | 0" | ✅ Rainfall sufficient |
| Dec | — | 4.7" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Richmond County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Rosemary 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.
Rosemary Planting Timeline — Richmond County, GA
Rosemary Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | March 30 | Mar 30 – Apr 13 |
| Harvest | June 22 | Jun 22 – Nov 9 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Transplant Outdoors |
| April | Transplant Outdoors |
| May | — |
| June | Harvest |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | Harvest |
| November | Harvest |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.3"/week · Natural rainfall sufficient
📅 Days to Maturity
80–180 days
🧪 Soil pH
Needs 6–7.5 · Your soil: acceptable
🗺️ USDA Zone
Zone 8b
📆 Growing Season
229 days in Richmond County
Growing Tips for Rosemary in Richmond County
Direct sow Rosemary outdoors after March 23 in Richmond County when soil has warmed and frost danger has passed.
With Richmond County's clay soil (26% clay), work in 3-4 inches of compost before planting Rosemary. Avoid tilling when soil is wet to prevent compaction.
With summer highs reaching 96°F in Richmond County, provide afternoon shade for Rosemary and water deeply in the morning.
General growing tips
Grow in well-drained soil and avoid overwatering. In cold climates, grow in containers and bring indoors for winter. Propagate from stem cuttings for faster results than seed.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Rosemary in Other Locations
Frequently Asked Questions
When should I plant Rosemary in Richmond County, GA?
Richmond County is in Zone 8b with an average last frost of March 23. Plan your Rosemary planting based on this frost date — see the calendar above for exact timing.
What planting zone is Richmond County, GA?
Richmond County, Georgia is in USDA Hardiness Zone 8b. The average last spring frost is March 23 and first fall frost is November 7.
Your Richmond County Garden Planner — Free
A 24-page printable planner built for Richmond 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.