When to Plant Rosemary in Leon County, TX
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.
Leon County, Texas is in USDA Zone 8a. The average last spring frost is March 9 and the first fall frost is November 14, giving you a growing season of approximately 250 days.
At an elevation of 226 feet, Leon County receives approximately 72.8 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 91°F, providing good warmth for Rosemary during the growing season. 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.
Leon County Soil Profile
Soil Type
Sandy Loam
Soil pH
5.4-6.2
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 Leon County
How your county's soil matches Rosemary's growing requirements.
Soil pH
Your soil pH (5.4–6.2) is more acidic than Rosemary prefers (6.0–7.5). Add garden lime to raise pH.
Soil Texture
Sandy soil in Leon County warms quickly in spring but drains fast. Rosemary will need more frequent watering and regular compost additions to retain nutrients.
Organic Matter
Organic matter is low (1.9%). Add 2-3 inches of compost before planting Rosemary.
How to Plant Rosemary
Succession Planting Rosemary
Sow every 9.1 weeks. Last sowing by May 18 to harvest before frost.
Plant 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 | — | 1.7" | 0" | ❄️ Dormant |
| Feb | — | 2.5" | 0" | ❄️ Dormant |
| Mar | 1.3" | 4.6" | 0" | ✅ Rainfall sufficient |
| Apr | 1.3" | 7" | 0" | ✅ Rainfall sufficient |
| May | 1.3" | 11.4" | 0" | ✅ Rainfall sufficient |
| Jun | 1.3" | 11.2" | 0" | ✅ Rainfall sufficient |
| Jul | 1.3" | 8.7" | 0" | ✅ Rainfall sufficient |
| Aug | 1.3" | 9.6" | 0" | ✅ Rainfall sufficient |
| Sep | 1.3" | 7.3" | 0" | ✅ Rainfall sufficient |
| Oct | 1.3" | 4.3" | 0" | ✅ Rainfall sufficient |
| Nov | 1.3" | 2.7" | 0" | ✅ Rainfall sufficient |
| Dec | — | 1.8" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Leon 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 — Leon County, TX
Rosemary Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | March 16 | Mar 16 – Mar 30 |
| Harvest | June 8 | Jun 8 – Oct 26 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Transplant Outdoors |
| April | — |
| May | — |
| June | Harvest |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | Harvest |
| 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 8a
📆 Growing Season
250 days in Leon County
Growing Tips for Rosemary in Leon County
Direct sow Rosemary outdoors after March 09 in Leon County when soil has warmed and frost danger has passed.
Sandy soil in Leon 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 73" of annual rainfall in Leon County, ensure good drainage for Rosemary — excess moisture can promote root rot and fungal diseases.
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 Leon County, TX?
Leon County is in Zone 8a with an average last frost of March 9. Plan your Rosemary planting based on this frost date — see the calendar above for exact timing.
What planting zone is Leon County, TX?
Leon County, Texas is in USDA Hardiness Zone 8a. The average last spring frost is March 9 and first fall frost is November 14.
Plan Your Garden with Confidence
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