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When to Plant Carrots in DeKalb County, AL

DeKalb County, Alabama Zone 8a May

What to do in May

A quick May briefing for DeKalb County, Alabama gardeners — what's urgent, what's next, and what can wait.

Avg. last frost April 1
Avg. first frost October 31
Soil temp (4") 68°F
Watering Low
Pest pressure Moderate
Daylight 13.8 hrs
  1. Basket week: carrots

    Don't tug. Use scissors or pruners for clean cuts — torn stems invite disease.

Coming up in June — start thinking about
  • First harvests: carrots

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Carrots are a popular root vegetable available in orange, purple, white, and yellow varieties. They are rich in beta-carotene and have a sweet, earthy flavor.

DeKalb County, Alabama is in USDA Zone 8a. The average last spring frost is April 1 and the first fall frost is October 31, giving you a growing season of approximately 213 days.

At an elevation of 393 feet, DeKalb County receives approximately 56.2 inches of rainfall annually with predominantly clay loam soil. Summer highs average 91°F, providing good warmth for Carrots during the growing season. Clay soil retains moisture well for Carrots, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Carrots root diseases.

DeKalb County, AL (Zone 8a) Long season
213 days
Last Spring Frost April 1
213 growing days
First Fall Frost October 31
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DeKalb County Soil Profile

Soil Type

Clay Loam

Soil pH

5.5-6.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (114 days to spare)
Transplant: Mar 26 🍅 Harvest: May 28 – Jul 2
Recommended (50%) ✓ Fits season (115 days to spare)
Transplant: Apr 1 🍅 Harvest: Jun 3 – Jul 8
Safe Start (90%) ✓ Fits season (112 days to spare)
Transplant: Apr 18 🍅 Harvest: Jun 20 – Jul 25

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 DeKalb County

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

Soil pH

Your soil pH (5.5–6.8) overlaps with Carrots's range (6.0–6.8), though not a perfect match.

Soil Texture

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

Organic Matter

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

How to Plant Carrots

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

Fall planting: Sow 10 weeks before your first frost date for a fall harvest.

Succession Planting Carrots

4
successive plantings in your 213-day season

Sow every 6.9 weeks. Last sowing by Aug 12 to harvest before frost.

For a dedicated fall crop, sow by Aug 22.

Plant Water Budget

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

Water stress score is 6/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Carrots

Carrots needs approximately 0.8 inches of water per week (3.5" per month). Here's how your county's rainfall compares month by month.

Month Carrots Needs Rainfall You Supplement Action
Jan 4.7" 0" ❄️ Dormant
Feb 4.1" 0" ❄️ Dormant
Mar 5.9" 0" ❄️ Dormant
Apr 3.5" 4" 0" ✅ Rainfall sufficient
May 3.5" 4.3" 0" ✅ Rainfall sufficient
Jun 3.5" 5.8" 0" ✅ Rainfall sufficient
Jul 3.5" 5.8" 0" ✅ Rainfall sufficient
Aug 3.5" 5" 0" ✅ Rainfall sufficient
Sep 3.5" 3.7" 0" ✅ Rainfall sufficient
Oct 3.5" 3.2" 0.3" 💧 Light watering
Nov 4.6" 0" ❄️ Dormant
Dec 5" 0" ❄️ Dormant

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

Carrots 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.

Carrots needs ~1,278 GDD — county provides 3,887 GDD Excellent fit

Carrots Planting Timeline — DeKalb County, AL

Carrots Planting Calendar

Activity When Date Range
Direct Sow March 18 Mar 18 – Apr 8
Harvest May 20 May 20 – Jun 24
Fall Sowing August 22 Aug 22 – Sep 5

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

Month-by-Month Timeline

MonthActivities
January
February
March Direct Sow
April Direct Sow
May Harvest
June Harvest
July
August Fall Sowing
September Fall Sowing
October
November
December
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Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.8"/week · Natural rainfall sufficient

📅 Days to Maturity

60–80 days

🧪 Soil pH

Needs 6–6.8 · Your soil: acceptable

🗺️ USDA Zone

Zone 8a

📆 Growing Season

213 days in DeKalb County

Growing Tips for Carrots in DeKalb County

Direct sow Carrots outdoors after April 01 in DeKalb County when soil has warmed and frost danger has passed.

With DeKalb County's clay soil (28% clay), work in 3-4 inches of compost before planting Carrots. Avoid tilling when soil is wet to prevent compaction.

Common pests for Carrots in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.

General growing tips

Sow seeds directly in loose, stone-free soil for straight roots. Keep soil moist until germination which can take 2-3 weeks. Thin seedlings to 2 inches apart.

Companion Planting

Good Companions

Avoid Planting Near

  • Dill
  • Parsnip

Check more plant combinations with our Companion Planting Checker →

🌾 Save Your Own Carrots Seeds
Life Cycle Biennial
Pollination Cross-Pollinated (insects)
How to Collect Replant roots for 2nd year flowers. Harvest umbels when brown.
Storage Store airtight; viable 3 years at 35°F, under 50% humidity.

Isolate 1/2 mile from Queen Anne's Lace (wild carrot). Biennial — requires two seasons.

Frequently Asked Questions

When should I plant Carrots in DeKalb County, AL?

DeKalb County is in Zone 8a with an average last frost of April 1. Plan your Carrots planting based on this frost date — see the calendar above for exact timing.

What planting zone is DeKalb County, AL?

DeKalb County, Alabama is in USDA Hardiness Zone 8a. The average last spring frost is April 1 and first fall frost is October 31.

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Your DeKalb County Garden Planner — Free

A 24-page printable planner built for DeKalb 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 DeKalb County, AL. 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.