When to plant Rosemary in Flagler County, FL
Plant Rosemary in Flagler County, between February 12 and February 26 — the only viable window. Zone 9b's short season (316 frost-free days) rules out a fall crop.
When to Plant Rosemary in Flagler County, FL
This month in Flagler County, Florida
If you only do a handful of things in the garden this August, make it these. They're sequenced around your zone's frost timing.
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Collect rosemary at their peak
The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.
Get ahead of September
- 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.
Flagler County, Florida is in USDA Zone 9b. The average last spring frost is February 5 and the first fall frost is December 17, giving you a growing season of approximately 315 days.
At an elevation of 134 feet, Flagler County receives approximately 54.2 inches of rainfall annually with predominantly sand soil. Summer highs average 99°F, so Rosemary may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Rosemary will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Rosemary root diseases.
Flagler County Soil Profile
Soil Type
Sand
Soil pH
5.1-5.7
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 Flagler County
How your county's soil matches Rosemary's growing requirements.
Soil pH
Your soil pH (5.1–5.7) is more acidic than Rosemary prefers (6.0–7.5). Add garden lime to raise pH.
Soil Texture
Sandy soil in Flagler County warms quickly in spring but drains fast. Rosemary will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Rosemary.
Organic Matter
Organic matter is low (1.6%). Add 2-3 inches of compost before planting Rosemary.
How to Plant Rosemary
Succession Planting Rosemary
Sow every 9.1 weeks. Last sowing by Jun 20 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 | — | 2.7" | 0" | ❄️ Dormant |
| Feb | 1.3" | 2.5" | 0" | ✅ Rainfall sufficient |
| Mar | 1.3" | 3" | 0" | ✅ Rainfall sufficient |
| Apr | 1.3" | 2.2" | 0" | ✅ Rainfall sufficient |
| May | 1.3" | 3.7" | 0" | ✅ Rainfall sufficient |
| Jun | 1.3" | 8.8" | 0" | ✅ Rainfall sufficient |
| Jul | 1.3" | 7.7" | 0" | ✅ Rainfall sufficient |
| Aug | 1.3" | 7.4" | 0" | ✅ Rainfall sufficient |
| Sep | 1.3" | 6.9" | 0" | ✅ Rainfall sufficient |
| Oct | 1.3" | 4.7" | 0" | ✅ Rainfall sufficient |
| Nov | 1.3" | 2" | 0" | ✅ Rainfall sufficient |
| Dec | 1.3" | 2.5" | 0" | ✅ Rainfall sufficient |
Water needs are for active growing months only (Feb–Dec in Flagler 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 — Flagler County, FL
Rosemary Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | February 12 | Feb 12 – Feb 26 |
| Harvest | May 7 | May 7 – Sep 24 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Transplant Outdoors |
| March | — |
| April | — |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| 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: too_acidic
🗺️ USDA Zone
Zone 9b
📆 Growing Season
315 days in Flagler County
Growing Tips for Rosemary in Flagler County
Direct sow Rosemary outdoors after February 05 in Flagler County when soil has warmed and frost danger has passed.
Sandy soil in Flagler County dries quickly — mulch Rosemary with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 99°F in Flagler 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 Flagler County, FL?
Flagler County is in Zone 9b with an average last frost of February 5. Plan your Rosemary planting based on this frost date — see the calendar above for exact timing.
What planting zone is Flagler County, FL?
Flagler County, Florida is in USDA Hardiness Zone 9b. The average last spring frost is February 5 and first fall frost is December 17.
When should I plant Rosemary in Flagler County, FL?
In Flagler County, FL, plant Rosemary after the last frost (around February 5) and before the first frost (around December 17). Best results when soil holds above 50°F.
What growing zone is Flagler County, FL for Rosemary?
Flagler County sits in USDA Zone 9b. Rosemary grows reliably in zones 7a through 10b, so it's a good fit here.
Can Rosemary grow in Flagler County's climate?
Yes — Rosemary grows well in Flagler County's temperate climate. Flagler County averages a 316-day frost-free season, with last frost around February 5 and first frost around December 17.
Your Flagler County Garden Planner — Free
A 22-page printable planner built for Flagler County (Zone 9b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.