When to Plant Oregano in Carter County, OK
Oregano is a robust perennial herb essential to Italian and Greek cuisine. Its pungent, savory leaves intensify in flavor when dried.
Carter County, Oklahoma is in USDA Zone 7b. The average last spring frost is March 28 and the first fall frost is November 2, giving you a growing season of approximately 219 days.
At an elevation of 648 feet, Carter County receives approximately 34.2 inches of rainfall annually with predominantly loam soil. Summer highs average 93°F, providing good warmth for Oregano during the growing season.
Carter County Soil Profile
Soil Type
Loam
Soil pH
6.4-7.5
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 Carter County
How your county's soil matches Oregano's growing requirements.
Soil pH
Your soil pH (6.4–7.5) is within Oregano's preferred range (6.0–8.0).
Soil Texture
The loam soil in Carter County is excellent for Oregano — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Oregano.
Organic Matter
Organic matter is moderate (3.3%). Annual compost additions will help Oregano.
How to Plant Oregano
Succession Planting Oregano
Sow every 6.9 weeks. Last sowing by Aug 04 to harvest before frost.
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Oregano
Oregano 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 | Oregano Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 0.8" | 0" | ❄️ Dormant |
| Feb | — | 1.3" | 0" | ❄️ Dormant |
| Mar | 1.3" | 1.9" | 0" | ✅ Rainfall sufficient |
| Apr | 1.3" | 3.1" | 0" | ✅ Rainfall sufficient |
| May | 1.3" | 5.8" | 0" | ✅ Rainfall sufficient |
| Jun | 1.3" | 6" | 0" | ✅ Rainfall sufficient |
| Jul | 1.3" | 4.3" | 0" | ✅ Rainfall sufficient |
| Aug | 1.3" | 3.9" | 0" | ✅ Rainfall sufficient |
| Sep | 1.3" | 2.8" | 0" | ✅ Rainfall sufficient |
| Oct | 1.3" | 2.3" | 0" | ✅ Rainfall sufficient |
| Nov | 1.3" | 1.2" | 0.1" | 💧 Light watering |
| Dec | — | 0.9" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Carter County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Oregano 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.
Oregano Planting Timeline — Carter County, OK
Oregano Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 4 | Apr 4 – Apr 18 |
| Harvest | June 6 | Jun 6 – Aug 15 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Transplant Outdoors |
| May | — |
| June | Harvest |
| July | Harvest |
| August | Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.3"/week · Natural rainfall sufficient
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6–8 · Your soil: ideal
🗺️ USDA Zone
Zone 7b
📆 Growing Season
219 days in Carter County
Growing Tips for Oregano in Carter County
Direct sow Oregano outdoors after March 28 in Carter County when soil has warmed and frost danger has passed.
General growing tips
Start from seed, cuttings, or divisions. Harvest just before flowering for strongest flavor. Cut plants back to a few inches in spring to encourage vigorous new growth.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Oregano in Other Locations
Frequently Asked Questions
When should I plant Oregano in Carter County, OK?
Carter County is in Zone 7b with an average last frost of March 28. Plan your Oregano planting based on this frost date — see the calendar above for exact timing.
What planting zone is Carter County, OK?
Carter County, Oklahoma is in USDA Hardiness Zone 7b. The average last spring frost is March 28 and first fall frost is November 2.
Plan Your Garden with Confidence
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