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When to plant Cosmos in Dougherty County County,

Plant Cosmos in Dougherty County County, when soil hits 50°F — usually February 7. Continue planting through February 28 for the spring crop.

When to Plant Cosmos in Dougherty County, GA

Dougherty County, Georgia Zone 9a June

Your June planting checklist for Dougherty County, Georgia

Your Dougherty County, Georgia garden is entering a new phase. Here's what's on the schedule for June and why each task matters now.

Avg. last frost March 7
Avg. first frost November 18
Soil temp (4") 82°F
Watering Low
Pest pressure High
Daylight 14 hrs
  1. Start harvesting cosmos

    Check every 1–2 days. Many of these get tough or go to seed if you wait too long.

To set up a strong July, finish these tasks
  • First harvests: cosmos

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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.

Dougherty County, Georgia is in USDA Zone 9a. The average last spring frost is March 7 and the first fall frost is November 18, giving you a growing season of approximately 256 days.

At an elevation of 269 feet, Dougherty County receives approximately 54.6 inches of rainfall annually with predominantly clay loam soil. Summer highs average 96°F, so Cosmos may need afternoon shade and extra watering during peak heat. 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.

Annual Blooms in Summer Pollinator-friendly Good for cutting
Dougherty County, GA (Zone 9a) Long season
256 days
Last Spring Frost March 7
256 growing days
First Fall Frost November 18
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Dougherty County Soil Profile

Soil Type

Clay Loam

Soil pH

5.4-6.2

Drainage

Well Drained

Cosmos Planting Risk Windows

Early Start (70% safe) ✓ Fits season (46 days to spare)
Start indoors: Jan 31 Transplant: Jan 31 🌸 Bloom: Apr 11 – Sep 26
Recommended (50%) ✓ Fits season (46 days to spare)
Start indoors: Feb 7 Transplant: Feb 7 🌸 Bloom: Apr 18 – Oct 3
Safe Start (90%) ✓ Fits season (42 days to spare)
Start indoors: Feb 26 Transplant: Feb 26 🌸 Bloom: May 7 – Oct 22

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 Dougherty County

How your county's soil matches Cosmos's growing requirements.

Soil pH

Your soil pH (5.4–6.2) is more acidic than Cosmos prefers (6.0–8.0). Add garden lime to raise pH.

Soil Texture

The clay loam soil in Dougherty 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

0.3"
Planting Depth
12"
Between Plants
18"
Between Rows

Succession Planting Cosmos

5
successive plantings in your 256-day season

Sow every 6.9 weeks. Last sowing by Aug 20 to harvest before frost.

Cosmos Water Budget

Plant needs
0.5″/week
Rainfall provides
0.9″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft

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 4.3" 0" ❄️ Dormant
Feb 4.2" 0" ❄️ Dormant
Mar 2.2" 5" 0" ✅ Rainfall sufficient
Apr 2.2" 4.5" 0" ✅ Rainfall sufficient
May 2.2" 4.8" 0" ✅ Rainfall sufficient
Jun 2.2" 4.4" 0" ✅ Rainfall sufficient
Jul 2.2" 5.2" 0" ✅ Rainfall sufficient
Aug 2.2" 5.3" 0" ✅ Rainfall sufficient
Sep 2.2" 4.6" 0" ✅ Rainfall sufficient
Oct 2.2" 3.7" 0" ✅ Rainfall sufficient
Nov 2.2" 3.7" 0" ✅ Rainfall sufficient
Dec 4.9" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in Dougherty 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 needs ~1,650 GDD — county provides 5,632 GDD Excellent fit

Cosmos Planting Timeline — Dougherty County, GA

Cosmos Planting Calendar

Activity When Date Range
Start Indoors February 7 Feb 7 – Feb 21
Transplant Outdoors February 7 Feb 7 – Feb 21
Direct Sow February 7 Feb 7 – Feb 28
Bloom April 18 Apr 18 – Oct 3

Plant 0.3" deep · 12" apart · Rows 18" apart

Month-by-Month Timeline

MonthActivities
January
February Start Indoors Transplant Outdoors Direct Sow
March
April Bloom
May Bloom
June Bloom
July Bloom
August Bloom
September Bloom
October Bloom
November
December
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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: too_acidic

🗺️ USDA Zone

Zone 9a

📆 Growing Season

256 days in Dougherty County

Growing Tips for Cosmos in Dougherty County

Direct sow Cosmos outdoors after March 07 in Dougherty County when soil has warmed and frost danger has passed.

With Dougherty County's clay soil (29% clay), work in 3-4 inches of compost before planting Cosmos. Avoid tilling when soil is wet to prevent compaction.

With summer highs reaching 96°F in Dougherty County, provide afternoon shade for Cosmos and water deeply in the morning.

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 →

Frequently Asked Questions

When should I plant Cosmos in Dougherty County, GA?

Dougherty County is in Zone 9a with an average last frost of March 7. Plan your Cosmos planting based on this frost date — see the calendar above for exact timing.

What planting zone is Dougherty County, GA?

Dougherty County, Georgia is in USDA Hardiness Zone 9a. The average last spring frost is March 7 and first fall frost is November 18.

When should I plant Cosmos in Dougherty County, ?

In Dougherty County, , plant Cosmos after the last frost (around March 7) and before the first frost (around November 18). Best results when soil holds above 50°F.

What growing zone is Dougherty County, for Cosmos?

Dougherty County sits in USDA Zone 9a. Cosmos grows reliably in zones 2a through 11b, so it's a good fit here.

Can Cosmos grow in Dougherty County's climate?

Yes — Cosmos grows well in Dougherty County's temperate climate. Dougherty County averages a 256-day frost-free season, with last frost around March 7 and first frost around November 18.

🌱

Your Dougherty County Garden Planner — Free

A 22-page printable planner built for Dougherty 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.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Dougherty County, GA. Local conditions may vary. Last updated: June 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.