When to plant Cosmos in Fayette County, GA
In Zone 8a (Fayette County), direct-sow Cosmos between March 14 and April 4 for spring, after the March 28 last-frost mark.
When to Plant Cosmos in Fayette County, GA
Cosmos (Cosmos bipinnatus) is an airy, feathery-foliaged cottage garden annual from Mexico that thrives on neglect. It produces delicate daisy-like blooms in shades of pink, white, and magenta from midsummer until frost. Cosmos is a prolific self-sower — once established in a garden it often returns year after year without replanting. Excellent habitat plant for beneficial insects.
Fayette County, Georgia is in USDA Zone 8a. The average last spring frost is March 28 and the first fall frost is November 3, giving you a growing season of approximately 220 days.
At an elevation of 268 feet, Fayette County receives approximately 61.9 inches of rainfall annually with predominantly clay loam soil. Summer highs average 92°F, providing good warmth for Cosmos during the growing season. Clay soil retains moisture well for Cosmos, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Cosmos root diseases.
Fayette County Soil Profile
Soil Type
Clay Loam
Soil pH
5.2-6.7
Drainage
Well Drained
Monthly Watering Guide for Cosmos
Cosmos needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Cosmos Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4.3" | 0" | ❄️ Dormant |
| Feb | — | 5.4" | 0" | ❄️ Dormant |
| Mar | 4.3" | 5.5" | 0" | ✅ Rainfall sufficient |
| Apr | 4.3" | 5.1" | 0" | ✅ Rainfall sufficient |
| May | 4.3" | 4.5" | 0" | ✅ Rainfall sufficient |
| Jun | 4.3" | 5.8" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 6.7" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 5.7" | 0" | ✅ Rainfall sufficient |
| Sep | 4.3" | 5.2" | 0" | ✅ Rainfall sufficient |
| Oct | 4.3" | 3.8" | 0.5" | 💧 Light watering |
| Nov | 4.3" | 4.8" | 0" | ✅ Rainfall sufficient |
| Dec | — | 5.1" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Fayette County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Cosmos Planting Timeline — Fayette County, GA
Cosmos Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 28 | Feb 28 – Mar 14 |
| Transplant Outdoors | March 14 | Mar 14 – Mar 28 |
| Direct Sow | March 14 | Mar 14 – Apr 4 |
| Bloom | May 23 | May 23 – Oct 10 |
Plant 0.3" deep · 12" apart · Rows 18" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors Transplant Outdoors Direct Sow |
| April | Direct Sow |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Low — drought tolerant
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6–8 · Your soil: N/A
🗺️ USDA Zone
Zone 8a
📆 Growing Season
220 days in Fayette County
Growing Tips for Fayette County
Direct-sow after last frost; cosmos germinates readily at 65-80°F in 7-10 days. Avoid rich soil — excess fertility produces lush foliage at the expense of blooms. Cosmos tolerates poor, dry soil exceptionally well. Pinch seedlings at 8 inches to encourage branching. Self-sows freely; allow some seed heads to mature and drop for a no-fuss perennial effect in warm climates.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Cosmos in Other Locations
Frequently Asked Questions
When should I plant Cosmos in Fayette County, GA?
Fayette County is in Zone 8a with an average last frost of March 28. Plan your Cosmos planting based on this frost date — see the calendar above for exact timing.
What planting zone is Fayette County, GA?
Fayette County, Georgia is in USDA Hardiness Zone 8a. The average last spring frost is March 28 and first fall frost is November 3.
When should I plant Cosmos in Fayette County, GA?
In Fayette County, GA, plant Cosmos after the last frost (around March 28) and before the first frost (around November 3). Best results when soil holds above 50°F.
What growing zone is Fayette County, GA for Cosmos?
Fayette County sits in USDA Zone 8a. Cosmos grows reliably in zones 2a through 11b, so it's a good fit here.
Can Cosmos grow in Fayette County's climate?
Yes — Cosmos grows well in Fayette County's temperate climate. Fayette County averages a 220-day frost-free season, with last frost around March 28 and first frost around November 3.
Your Fayette County Garden Planner — Free
A 22-page printable planner built for Fayette County (Zone 8a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.