When to plant Cosmos in Baldwin County, GA
Plant Cosmos in Baldwin County from March 2 to March 23 in spring. Baldwin County sits in USDA Zone 8b, with last frost around March 23 and first frost on November 8.
When to Plant Cosmos in Baldwin County, GA
What to do in July
A quick July briefing for Baldwin County, Georgia gardeners — what's urgent, what's next, and what can wait.
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Harvest cosmos as they ripen
The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.
To set up a strong August, finish these tasks
- First harvests: cosmos
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.
Baldwin County, Georgia is in USDA Zone 8b. The average last spring frost is March 23 and the first fall frost is November 8, giving you a growing season of approximately 230 days.
At an elevation of 421 feet, Baldwin County receives approximately 59 inches of rainfall annually with predominantly clay loam soil. Summer highs average 91°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.
Baldwin County Soil Profile
Soil Type
Clay Loam
Soil pH
5.4-6.6
Drainage
Well Drained
Cosmos 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 Baldwin County
How your county's soil matches Cosmos's growing requirements.
Soil pH
Your soil pH (5.4–6.6) overlaps with Cosmos's range (6.0–8.0), though not a perfect match.
Soil Texture
The clay loam soil in Baldwin County is excellent for Cosmos — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Cosmos prefers dry conditions but your soil drains poorly. Use raised beds or mounded rows to prevent root rot.
Organic Matter
Organic matter is moderate (2.4%). Annual compost additions will help Cosmos.
How to Plant Cosmos
Succession Planting Cosmos
Sow every 6.9 weeks. Last sowing by Aug 10 to harvest before frost.
Cosmos Water Budget
Monthly Watering Guide for Cosmos
Cosmos needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.
| Month | Cosmos Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4.7" | 0" | ❄️ Dormant |
| Feb | — | 4.7" | 0" | ❄️ Dormant |
| Mar | 2.2" | 5.5" | 0" | ✅ Rainfall sufficient |
| Apr | 2.2" | 5.2" | 0" | ✅ Rainfall sufficient |
| May | 2.2" | 4.9" | 0" | ✅ Rainfall sufficient |
| Jun | 2.2" | 5" | 0" | ✅ Rainfall sufficient |
| Jul | 2.2" | 5.4" | 0" | ✅ Rainfall sufficient |
| Aug | 2.2" | 5.7" | 0" | ✅ Rainfall sufficient |
| Sep | 2.2" | 5" | 0" | ✅ Rainfall sufficient |
| Oct | 2.2" | 3.7" | 0" | ✅ Rainfall sufficient |
| Nov | 2.2" | 4.6" | 0" | ✅ Rainfall sufficient |
| Dec | — | 4.6" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Baldwin County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Cosmos 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.
Cosmos Planting Timeline — Baldwin County, GA
Cosmos Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 23 | Feb 23 – Mar 9 |
| Transplant Outdoors | March 2 | Mar 2 – Mar 16 |
| Direct Sow | March 2 | Mar 2 – Mar 23 |
| Bloom | May 11 | May 11 – Oct 12 |
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 | — |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.5"/week · Natural rainfall sufficient
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6–8 · Your soil: acceptable
🗺️ USDA Zone
Zone 8b
📆 Growing Season
230 days in Baldwin County
Growing Tips for Cosmos in Baldwin County
Direct sow Cosmos outdoors after March 23 in Baldwin County when soil has warmed and frost danger has passed.
With Baldwin County's clay soil (30% clay), work in 3-4 inches of compost before planting Cosmos. Avoid tilling when soil is wet to prevent compaction.
Common pests for Cosmos in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.
General growing tips
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 Baldwin County, GA?
Baldwin County is in Zone 8b with an average last frost of March 23. Plan your Cosmos planting based on this frost date — see the calendar above for exact timing.
What planting zone is Baldwin County, GA?
Baldwin County, Georgia is in USDA Hardiness Zone 8b. The average last spring frost is March 23 and first fall frost is November 8.
When should I plant Cosmos in Baldwin County, GA?
In Baldwin County, GA, plant Cosmos after the last frost (around March 23) and before the first frost (around November 8). Best results when soil holds above 50°F.
What growing zone is Baldwin County, GA for Cosmos?
Baldwin County sits in USDA Zone 8b. Cosmos grows reliably in zones 2a through 11b, so it's a good fit here.
Can Cosmos grow in Baldwin County's climate?
Yes — Cosmos grows well in Baldwin County's temperate climate. Baldwin County averages a 230-day frost-free season, with last frost around March 23 and first frost around November 8.
Your Baldwin County Garden Planner — Free
A 22-page printable planner built for Baldwin County (Zone 8b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.