When to plant Phlox in Coffee County County,
Phlox planted in Coffee County County between February 22 and March 15 matures in 110 days — well before the November 22 first frost.
When to Plant Phlox in Coffee County, GA
What to do in June
Each item below is timed to Coffee County, Georgia's frost dates and soil temperatures. Skip nothing, stress about nothing.
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Bring in the phlox
Don't tug. Use scissors or pruners for clean cuts — torn stems invite disease.
Garden Phlox (Phlox paniculata) is a beloved native perennial of eastern North America, producing large, domed clusters of fragrant flowers atop upright stems from mid-summer into fall. Its sweet honey-like fragrance carries on summer evenings and draws hummingbirds, butterflies, and sphinx moths. Modern cultivars offer colors spanning white, pink, salmon, red, purple, and bicolors. A classic cottage garden stalwart, phlox combines well with black-eyed Susans, echinacea, and ornamental grasses in naturalistic plantings. Select mildew-resistant cultivars for best long-term performance.
Coffee County, Georgia is in USDA Zone 9a. The average last spring frost is March 8 and the first fall frost is November 22, giving you a growing season of approximately 259 days.
At an elevation of 110 feet, Coffee County receives approximately 59.5 inches of rainfall annually with predominantly clay loam soil. Summer highs average 95°F, so Phlox may need afternoon shade and extra watering during peak heat. Clay soil retains moisture well for Phlox, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Phlox root diseases.
Coffee County Soil Profile
Soil Type
Clay Loam
Soil pH
5.6-6.3
Drainage
Well Drained
Phlox 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 Coffee County
How your county's soil matches Phlox's growing requirements.
Soil pH
Your soil pH (5.6–6.3) is more acidic than Phlox prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
The clay loam soil in Coffee County is excellent for Phlox — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Phlox.
Organic Matter
Organic matter is moderate (2.5%). Annual compost additions will help Phlox.
How to Plant Phlox
Succession Planting Phlox
Sow every 9.1 weeks. Last sowing by Aug 04 to harvest before frost.
Phlox Water Budget
Monthly Watering Guide for Phlox
Phlox needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Phlox Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 5.1" | 0" | ❄️ Dormant |
| Feb | — | 4.8" | 0" | ❄️ Dormant |
| Mar | 4.3" | 5.9" | 0" | ✅ Rainfall sufficient |
| Apr | 4.3" | 4.8" | 0" | ✅ Rainfall sufficient |
| May | 4.3" | 4.9" | 0" | ✅ Rainfall sufficient |
| Jun | 4.3" | 4.8" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 5.9" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 5.8" | 0" | ✅ Rainfall sufficient |
| Sep | 4.3" | 4.4" | 0" | ✅ Rainfall sufficient |
| Oct | 4.3" | 3.6" | 0.7" | 💧 Light watering |
| Nov | 4.3" | 4.6" | 0" | ✅ Rainfall sufficient |
| Dec | — | 4.7" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Coffee County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Phlox 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.
Phlox Planting Timeline — Coffee County, GA
Phlox Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 11 | Jan 11 – Jan 25 |
| Transplant Outdoors | February 22 | Feb 22 – Mar 8 |
| Direct Sow | February 22 | Feb 22 – Mar 15 |
| Bloom | May 3 | May 3 – Jun 28 |
Plant 0.3" deep · 18" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | Transplant Outdoors Direct Sow |
| March | Transplant Outdoors Direct Sow |
| April | — |
| May | Bloom |
| June | Bloom |
| July | — |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · Natural rainfall sufficient
📅 Days to Maturity
80–110 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 9a
📆 Growing Season
259 days in Coffee County
Growing Tips for Phlox in Coffee County
Direct sow Phlox outdoors after March 08 in Coffee County when soil has warmed and frost danger has passed.
With Coffee County's clay soil (32% clay), work in 3-4 inches of compost before planting Phlox. Avoid tilling when soil is wet to prevent compaction.
General growing tips
Start seeds indoors 8–10 weeks before last frost, or transplant container divisions in spring. Named cultivar seeds may not come true; divisions from named plants are the preferred propagation method. Space generously (18–24 inches) and avoid overhead watering to reduce powdery mildew risk. Good air circulation is critical — thin clumps to the strongest 5–7 stems per plant in spring. Deadhead after the primary bloom flush to encourage secondary flowering. Division every 2–3 years in spring keeps plants vigorous. Fall planting of divisions (Zones 5+) is equally effective. Year 2+ plants develop into full clumps with the most prolific bloom.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Phlox in Other Locations
Frequently Asked Questions
When should I plant Phlox in Coffee County, GA?
Coffee County is in Zone 9a with an average last frost of March 8. Plan your Phlox planting based on this frost date — see the calendar above for exact timing.
What planting zone is Coffee County, GA?
Coffee County, Georgia is in USDA Hardiness Zone 9a. The average last spring frost is March 8 and first fall frost is November 22.
When should I plant Phlox in Coffee County, ?
In Coffee County, , plant Phlox after the last frost (around March 8) and before the first frost (around November 22). Best results when soil holds above 50°F.
What growing zone is Coffee County, for Phlox?
Coffee County sits in USDA Zone 9a. Phlox grows reliably in zones 3a through 9a, so it's a good fit here.
Can Phlox grow in Coffee County's climate?
Yes — Phlox grows well in Coffee County's temperate climate. Coffee County averages a 259-day frost-free season, with last frost around March 8 and first frost around November 22.
Your Coffee County Garden Planner — Free
A 22-page printable planner built for Coffee County (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.