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When to Plant Jicama in Chatham County, GA

Chatham County, Georgia Zone 9a May

May to-do list for Chatham County, Georgia

May is a pivotal month for Chatham County, Georgia gardens. Focus on these tasks first and you'll set up the rest of the season for success.

Avg. last frost March 5
Avg. first frost November 23
Soil temp (4") 73°F
Watering Low
Pest pressure High
Daylight 13.6 hrs

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Jicama is a tropical legume grown for its crisp, sweet, starchy root. It requires a very long, warm growing season but produces a refreshing, water chestnut-like tuber.

Chatham County, Georgia is in USDA Zone 9a. The average last spring frost is March 5 and the first fall frost is November 23, giving you a growing season of approximately 263 days.

At an elevation of 398 feet, Chatham County receives approximately 51.2 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 91°F, providing good warmth for Jicama during the growing season. Sandy soil warms quickly in spring — great for early planting — but Jicama will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Jicama root diseases.

Chatham County, GA (Zone 9a) Long season
263 days
Last Spring Frost March 5
263 growing days
First Fall Frost November 23

Chatham County Soil Profile

Soil Type

Sandy Loam

Soil pH

5-6.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (66 days to spare)
Start indoors: Jan 9 Transplant: Feb 27 🍅 Harvest: Jul 3 – Sep 11
Recommended (50%) ✓ Fits season (60 days to spare)
Start indoors: Jan 22 Transplant: Mar 12 🍅 Harvest: Jul 16 – Sep 24
Safe Start (90%) ✓ Fits season (62 days to spare)
Start indoors: Feb 10 Transplant: Mar 31 🍅 Harvest: Aug 4 – Oct 13

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 Chatham County

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

Soil pH

Your soil pH (5.0–6.1) is more acidic than Jicama prefers (6.0–7.5). Add garden lime to raise pH.

Soil Texture

Sandy soil in Chatham County warms quickly in spring but drains fast. Jicama will need more frequent watering and regular compost additions to retain nutrients.

Drainage

Drainage is adequate for Jicama.

Organic Matter

Organic matter is moderate (2.2%). Annual compost additions will help Jicama.

How to Plant Jicama

0.5"
Planting Depth
6"
Between Plants
12"
Between Rows

Plant Water Budget

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

Monthly Watering Guide for Jicama

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

Month Jicama Needs Rainfall You Supplement Action
Jan 4.3" 0" ❄️ Dormant
Feb 4.4" 0" ❄️ Dormant
Mar 4.3" 4.8" 0" ✅ Rainfall sufficient
Apr 4.3" 4.2" 0.1" 💧 Light watering
May 4.3" 4.2" 0.1" 💧 Light watering
Jun 4.3" 4.4" 0" ✅ Rainfall sufficient
Jul 4.3" 6" 0" ✅ Rainfall sufficient
Aug 4.3" 4.3" 0" ✅ Rainfall sufficient
Sep 4.3" 3.4" 0.9" 💧 Light watering
Oct 4.3" 2.9" 1.4" 💧 Light watering
Nov 4.3" 4" 0.3" 💧 Light watering
Dec 4.3" 0" ❄️ Dormant

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

Jicama 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.

Jicama needs ~2,738 GDD — county provides 4,799 GDD Excellent fit

Jicama Planting Timeline — Chatham County, GA

Jicama Planting Calendar

Activity When Date Range
Start Indoors January 22 Jan 22 – Feb 5
Transplant Outdoors March 12 Mar 12 – Mar 26
Direct Sow March 5 Mar 5 – Mar 26
Harvest July 16 Jul 16 – Sep 24

Plant 0.5" deep · 6" apart · Rows 12" apart

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · Natural rainfall sufficient

📅 Days to Maturity

120–180 days

🧪 Soil pH

Needs 6–7.5 · Your soil: too_acidic

🗺️ USDA Zone

Zone 9a

📆 Growing Season

263 days in Chatham County

Growing Tips for Jicama in Chatham County

Direct sow Jicama outdoors after March 05 in Chatham County when soil has warmed and frost danger has passed.

Sandy soil in Chatham County dries quickly — mulch Jicama with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.

Common pests for Jicama in this region include bean beetles and aphids. Use row covers early in the season and inspect plants weekly.

General growing tips

Start seeds indoors 8-10 weeks before last frost. Pinch off flowers to direct energy to root development. Harvest before first frost when roots are 3-6 inches across.

Companion Planting

Good Companions

Avoid Planting Near

  • Fennel

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Jicama in Chatham County, GA?

Chatham County is in Zone 9a with an average last frost of March 5. Plan your Jicama planting based on this frost date — see the calendar above for exact timing.

What planting zone is Chatham County, GA?

Chatham County, Georgia is in USDA Hardiness Zone 9a. The average last spring frost is March 5 and first fall frost is November 23.

🌱

Your Chatham County Garden Planner — Free

A 24-page printable planner built for Chatham 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 Chatham County, GA. Local conditions may vary. Last updated: May 2026.

Sources & credits

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