When to plant Rosemary in Bourbon County County,
Plant Rosemary in Bourbon County County during the brief April 15–April 29 window. With 200 frost-free days, fall plantings can't mature before October 25.
When to Plant Rosemary in Bourbon County, KS
June in the garden — Bourbon County, Kansas
June rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Bourbon County, Kansas.
Coming up in July — 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.
Bourbon County, Kansas is in USDA Zone 7a. The average last spring frost is April 8 and the first fall frost is October 25, giving you a growing season of approximately 200 days.
At an elevation of 438 feet, Bourbon County receives approximately 26 inches of rainfall annually with predominantly loam soil. Summer highs average 85°F, providing good warmth for Rosemary during the growing season.
Bourbon County Soil Profile
Soil Type
Loam
Soil pH
6.2-7.2
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 Bourbon County
How your county's soil matches Rosemary's growing requirements.
Soil pH
Your soil pH (6.2–7.2) is within Rosemary's preferred range (6.0–7.5).
Soil Texture
The loam soil in Bourbon County is excellent for Rosemary — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (3.8%). Annual compost additions will help Rosemary.
How to Plant Rosemary
Succession Planting Rosemary
Sow every 9.1 weeks. Last sowing by Apr 28 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 | — | 0.6" | 0" | ❄️ Dormant |
| Feb | — | 0.8" | 0" | ❄️ Dormant |
| Mar | — | 1.8" | 0" | ❄️ Dormant |
| Apr | 1.3" | 2.7" | 0" | ✅ Rainfall sufficient |
| May | 1.3" | 4.2" | 0" | ✅ Rainfall sufficient |
| Jun | 1.3" | 3.8" | 0" | ✅ Rainfall sufficient |
| Jul | 1.3" | 3.2" | 0" | ✅ Rainfall sufficient |
| Aug | 1.3" | 3.3" | 0" | ✅ Rainfall sufficient |
| Sep | 1.3" | 2.4" | 0" | ✅ Rainfall sufficient |
| Oct | 1.3" | 1.8" | 0" | ✅ Rainfall sufficient |
| Nov | — | 0.8" | 0" | ❄️ Dormant |
| Dec | — | 0.6" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Bourbon 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 — Bourbon County, KS
Rosemary Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 15 | Apr 15 – Apr 29 |
| Harvest | July 8 | Jul 8 – Nov 25 |
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: ideal
🗺️ USDA Zone
Zone 7a
📆 Growing Season
200 days in Bourbon County
Growing Tips for Rosemary in Bourbon County
Direct sow Rosemary outdoors after April 08 in Bourbon 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 Bourbon County, KS?
Bourbon County is in Zone 7a with an average last frost of April 8. Plan your Rosemary planting based on this frost date — see the calendar above for exact timing.
What planting zone is Bourbon County, KS?
Bourbon County, Kansas is in USDA Hardiness Zone 7a. The average last spring frost is April 8 and first fall frost is October 25.
When should I plant Rosemary in Bourbon County County, ?
In Bourbon County County, , plant Rosemary after the last frost (around April 8) and before the first frost (around October 25). Best results when soil holds above 50°F.
What growing zone is Bourbon County County, for Rosemary?
Bourbon County 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 Bourbon County County's climate?
Yes — Rosemary grows well in Bourbon County County's temperate climate. Bourbon County County averages a 200-day frost-free season, with last frost around April 8 and first frost around October 25.
Your Bourbon County Garden Planner — Free
A 22-page printable planner built for Bourbon 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.