When to plant Rosemary in Simpson County, KY
Plant Rosemary in Simpson County, between April 13 and April 27 — the only viable window. Zone 7a's short season (206 frost-free days) rules out a fall crop.
When to Plant Rosemary in Simpson County, KY
July in Simpson County, Kentucky — your action list
Here's what deserves your attention in Simpson County, Kentucky this month. Everything below is tailored to Zone 7a and timed around your local frost dates.
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Harvest rosemary as they ripen
This is the payoff month. Bring a basket, bring a friend, and get into the beds.
To set up a strong August, finish these tasks
- 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.
Simpson County, Kentucky is in USDA Zone 7a. The average last spring frost is April 6 and the first fall frost is October 29, giving you a growing season of approximately 206 days.
At an elevation of 3,996 feet, Simpson County receives approximately 49.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 89°F, providing good warmth for Rosemary during the growing season.
Simpson County Soil Profile
Soil Type
Silt Loam
Soil pH
5.5-6.7
Drainage
Well Drained
Rosemary 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 Rosemary's growing requirements.
Soil pH
Your soil pH (5.5–6.7) overlaps with Rosemary's range (6.0–7.5), though not a perfect match.
Soil Texture
The silt loam soil in Simpson County is excellent for Rosemary — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Rosemary prefers dry conditions but your soil drains poorly. Use raised beds or mounded rows to prevent root rot.
Organic Matter
Organic matter is moderate (2.5%). Annual compost additions will help Rosemary.
How to Plant Rosemary
Succession Planting Rosemary
Sow every 9.1 weeks. Last sowing by May 02 to harvest before frost.
Rosemary Water Budget
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 | — | 4.1" | 0" | ❄️ Dormant |
| Feb | — | 3.9" | 0" | ❄️ Dormant |
| Mar | — | 3.9" | 0" | ❄️ Dormant |
| Apr | 1.3" | 4" | 0" | ✅ Rainfall sufficient |
| May | 1.3" | 3.8" | 0" | ✅ Rainfall sufficient |
| Jun | 1.3" | 4.6" | 0" | ✅ Rainfall sufficient |
| Jul | 1.3" | 5.6" | 0" | ✅ Rainfall sufficient |
| Aug | 1.3" | 4.9" | 0" | ✅ Rainfall sufficient |
| Sep | 1.3" | 3.6" | 0" | ✅ Rainfall sufficient |
| Oct | 1.3" | 2.9" | 0" | ✅ Rainfall sufficient |
| Nov | — | 4" | 0" | ❄️ Dormant |
| Dec | — | 4.3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Simpson 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 — Simpson County, KY
Rosemary Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 13 | Apr 13 – Apr 27 |
| Harvest | July 6 | Jul 6 – Nov 23 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Transplant Outdoors |
| May | — |
| June | — |
| 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 7a
📆 Growing Season
206 days in Simpson County
Growing Tips for Rosemary in Simpson County
Direct sow Rosemary outdoors after April 06 in Simpson County when soil has warmed and frost danger has passed.
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 Simpson County, KY?
Simpson County is in Zone 7a with an average last frost of April 6. Plan your Rosemary planting based on this frost date — see the calendar above for exact timing.
What planting zone is Simpson County, KY?
Simpson County, Kentucky is in USDA Hardiness Zone 7a. The average last spring frost is April 6 and first fall frost is October 29.
When should I plant Rosemary in Simpson County, KY?
In Simpson County, KY, plant Rosemary after the last frost (around April 6) and before the first frost (around October 29). Best results when soil holds above 50°F.
What growing zone is Simpson County, KY for Rosemary?
Simpson County sits in USDA Zone 7a. Rosemary grows reliably in zones 7a through 10b, so it's a good fit here.
Can Rosemary grow in Simpson County's climate?
Yes — Rosemary grows well in Simpson County's temperate climate. Simpson County averages a 206-day frost-free season, with last frost around April 6 and first frost around October 29.
Your Simpson County Garden Planner — Free
A 22-page printable planner built for Simpson County (Zone 7a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.