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When to plant Geraniums in Barrow County County,

Plant Geraniums in Barrow County County during the brief March 16–March 30 window. With 235 frost-free days, fall plantings can't mature before November 13.

When to Plant Geraniums in Barrow County, GA

Barrow County, Georgia Zone 8a June

June in the garden — Barrow County, Georgia

Your garden in Barrow County, Georgia is working on a schedule, even when you're not. Here's where you should be this June.

Avg. last frost March 23
Avg. first frost November 13
Soil temp (4") 78°F
Watering Low
Pest pressure High
Daylight 14.3 hrs
  1. Start geraniums indoors

    Label every cell. You will absolutely forget which is which otherwise.

  2. Harvest geraniums as they ripen

    Taste as you pick. The first ripe produce is the best feedback loop you'll get all season.

Looking ahead to July
  • First harvests: geraniums

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Geraniums (Pelargonium × hortorum) are tender perennials grown as warm-season annuals throughout North America. Prized for their bold flower clusters, long bloom period, and tolerance of summer heat when planted in well-drained soil, they anchor window boxes, containers, and bed borders from late spring until hard frost. Zones 9b–11b can overwinter plants in the ground.

Barrow County, Georgia is in USDA Zone 8a. The average last spring frost is March 23 and the first fall frost is November 13, giving you a growing season of approximately 235 days.

At an elevation of 438 feet, Barrow County receives approximately 60.5 inches of rainfall annually with predominantly clay loam soil. Summer highs average 93°F, providing good warmth for Geraniums during the growing season. Clay soil retains moisture well for Geraniums, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Geraniums root diseases.

Annual Blooms in Multi-season Pollinator-friendly Deer-resistant Good for cutting Fragrant
Barrow County, GA (Zone 8a) Long season
235 days
Last Spring Frost March 23
235 growing days
First Fall Frost November 13
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Barrow County Soil Profile

Soil Type

Clay Loam

Soil pH

5.3-6.7

Drainage

Well Drained

Geraniums Planting Risk Windows

Early Start (70% safe) ✓ Fits season (32 days to spare)
Start indoors: Jan 3 Transplant: Mar 7 🌸 Bloom: May 16 – Oct 3
Recommended (50%) ✓ Fits season (32 days to spare)
Start indoors: Jan 12 Transplant: Mar 16 🌸 Bloom: May 25 – Oct 12
Safe Start (90%) ✓ Fits season (31 days to spare)
Start indoors: Jan 30 Transplant: Apr 3 🌸 Bloom: Jun 12 – Oct 30

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 Barrow County

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

Soil pH

Your soil pH (5.3–6.7) overlaps with Geraniums's range (6.0–7.0), though not a perfect match.

Soil Texture

The clay loam soil in Barrow County is excellent for Geraniums — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.3%). Annual compost additions will help Geraniums.

How to Plant Geraniums

0.1"
Planting Depth
12"
Between Plants
14"
Between Rows

Succession Planting Geraniums

3
successive plantings in your 235-day season

Sow every 8 weeks. Last sowing by Aug 05 to harvest before frost.

Geraniums Water Budget

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

Monthly Watering Guide for Geraniums

Geraniums needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.

Month Geraniums Needs Rainfall You Supplement Action
Jan 4.5" 0" ❄️ Dormant
Feb 5.4" 0" ❄️ Dormant
Mar 4.3" 6.5" 0" ✅ Rainfall sufficient
Apr 4.3" 4.3" 0" ✅ Rainfall sufficient
May 4.3" 5.1" 0" ✅ Rainfall sufficient
Jun 4.3" 5.1" 0" ✅ Rainfall sufficient
Jul 4.3" 6.6" 0" ✅ Rainfall sufficient
Aug 4.3" 5.4" 0" ✅ Rainfall sufficient
Sep 4.3" 4.6" 0" ✅ Rainfall sufficient
Oct 4.3" 3.5" 0.8" 💧 Light watering
Nov 4.3" 5.3" 0" ✅ Rainfall sufficient
Dec 4.2" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in Barrow County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Geraniums 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.

Geraniums needs ~1,679 GDD — county provides 4,641 GDD Excellent fit

Geraniums Planting Timeline — Barrow County, GA

Geraniums Planting Calendar

Activity When Date Range
Start Indoors January 12 Jan 12 – Jan 26
Transplant Outdoors March 16 Mar 16 – Mar 30
Bloom May 25 May 25 – Oct 12

Plant 0.1" deep · 12" apart · Rows 14" apart

Month-by-Month Timeline

MonthActivities
January Start Indoors
February
March Transplant Outdoors
April
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

1"/week · Natural rainfall sufficient

📅 Days to Maturity

70–100 days

🧪 Soil pH

Needs 6–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 8a

📆 Growing Season

235 days in Barrow County

Growing Tips for Geraniums in Barrow County

Direct sow Geraniums outdoors after March 23 in Barrow County when soil has warmed and frost danger has passed.

With Barrow County's clay soil (33% clay), work in 3-4 inches of compost before planting Geraniums. Avoid tilling when soil is wet to prevent compaction.

General growing tips

Start seeds indoors 10–12 weeks before last frost — germination is slow and erratic without bottom heat (70–75°F). Transplant after frost danger passes. Geraniums rarely direct-sown; cuttings or transplants are the standard. Deadhead spent umbels weekly to maintain continuous bloom. Let soil dry slightly between waterings to prevent root rot. In zones 10–11 plants may be left in ground year-round or overwintered as houseplants.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Geraniums in Barrow County, GA?

Barrow County is in Zone 8a with an average last frost of March 23. Plan your Geraniums planting based on this frost date — see the calendar above for exact timing.

What planting zone is Barrow County, GA?

Barrow County, Georgia is in USDA Hardiness Zone 8a. The average last spring frost is March 23 and first fall frost is November 13.

When should I plant Geraniums in Barrow County, ?

In Barrow County, , plant Geraniums after the last frost (around March 23) and before the first frost (around November 13). Best results when soil holds above 50°F.

What growing zone is Barrow County, for Geraniums?

Barrow County sits in USDA Zone 8a. Geraniums grows reliably in zones 2a through 11b, so it's a good fit here.

Can Geraniums grow in Barrow County's climate?

Yes — Geraniums grows well in Barrow County's temperate climate. Barrow County averages a 235-day frost-free season, with last frost around March 23 and first frost around November 13.

🌱

Your Barrow County Garden Planner — Free

A 22-page printable planner built for Barrow 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.

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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 Barrow 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.