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When to plant Fennel in Greene County, AL

Plant Fennel in Greene County from March 27 to April 17 in spring. Greene County sits in USDA Zone 8b, with last frost around March 20 and first frost on November 11.

When to Plant Fennel in Greene County, AL

Greene County, Alabama Zone 8b July

Your July game plan for Greene County, Alabama

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

Avg. last frost March 20
Avg. first frost November 11
Soil temp (4") 85°F
Watering Low
Pest pressure High
Daylight 14 hrs
  1. It's harvest week for fennel

    The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.

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Florence fennel is grown for its swollen bulb-like stem base, which has a mild anise flavor. It is crisp raw in salads and sweet when roasted or braised.

Greene County, Alabama is in USDA Zone 8b. The average last spring frost is March 20 and the first fall frost is November 11, giving you a growing season of approximately 236 days.

At an elevation of 128 feet, Greene County receives approximately 61.8 inches of rainfall annually with predominantly clay loam soil. Summer highs average 91°F, providing good warmth for Fennel during the growing season. Clay soil retains moisture well for Fennel, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Fennel root diseases.

Greene County, AL (Zone 8b) Long season
236 days
Last Spring Frost March 20
236 growing days
First Fall Frost November 11

Greene County Soil Profile

Soil Type

Clay Loam

Soil pH

5.5-6.6

Drainage

Well Drained

Fennel Planting Risk Windows

Early Start (70% safe) ✓ Fits season (117 days to spare)
Start indoors: Jan 20 Transplant: Mar 24 🍅 Harvest: May 26 – Jul 7
Recommended (50%) ✓ Fits season (117 days to spare)
Start indoors: Jan 30 Transplant: Apr 3 🍅 Harvest: Jun 5 – Jul 17
Safe Start (90%) ✓ Fits season (112 days to spare)
Start indoors: Feb 19 Transplant: Apr 23 🍅 Harvest: Jun 25 – Aug 6

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 Greene County

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

Soil pH

Your soil pH (5.5–6.6) is within Fennel's preferred range (5.5–7.0).

Soil Texture

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

Organic Matter

Organic matter is moderate (2.1%). Annual compost additions will help Fennel.

How to Plant Fennel

1"
Planting Depth
15"
Between Plants
24"
Between Rows

Succession Planting Fennel

4
successive plantings in your 236-day season

Sow every 6.9 weeks. Last sowing by Aug 13 to harvest before frost.

Fennel Water Budget

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

Monthly Watering Guide for Fennel

Fennel needs approximately 0.6 inches of water per week (2.6" per month). Here's how your county's rainfall compares month by month.

Month Fennel Needs Rainfall You Supplement Action
Jan 5.4" 0" ❄️ Dormant
Feb 5.7" 0" ❄️ Dormant
Mar 2.6" 5.7" 0" ✅ Rainfall sufficient
Apr 2.6" 4.7" 0" ✅ Rainfall sufficient
May 2.6" 5.1" 0" ✅ Rainfall sufficient
Jun 2.6" 4.9" 0" ✅ Rainfall sufficient
Jul 2.6" 6" 0" ✅ Rainfall sufficient
Aug 2.6" 5.6" 0" ✅ Rainfall sufficient
Sep 2.6" 4.9" 0" ✅ Rainfall sufficient
Oct 2.6" 3.8" 0" ✅ Rainfall sufficient
Nov 2.6" 5.4" 0" ✅ Rainfall sufficient
Dec 4.6" 0" ❄️ Dormant

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

Fennel 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.

Fennel needs ~1,369 GDD — county provides 4,307 GDD Excellent fit

Fennel Planting Timeline — Greene County, AL

Fennel Planting Calendar

Activity When Date Range
Start Indoors January 30 Jan 30 – Feb 13
Transplant Outdoors April 3 Apr 3 – Apr 17
Direct Sow March 27 Mar 27 – Apr 17
Harvest June 5 Jun 5 – Jul 17

Plant 1" deep · 15" apart · Rows 24" apart

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.6"/week · Natural rainfall sufficient

📅 Days to Maturity

60–90 days

🧪 Soil pH

Needs 5.5–7 · Your soil: ideal

🗺️ USDA Zone

Zone 8b

📆 Growing Season

236 days in Greene County

Growing Tips for Fennel in Greene County

Direct sow Fennel outdoors after March 20 in Greene County when soil has warmed and frost danger has passed.

With Greene County's clay soil (34% clay), work in 3-4 inches of compost before planting Fennel. Avoid tilling when soil is wet to prevent compaction.

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

General growing tips

Direct sow in late summer for fall harvest to reduce bolting. Hill soil around bulbs as they enlarge. Harvest when bulbs are tennis-ball sized before they elongate.

Companion Planting

Good Companions

Avoid Planting Near

  • Tomatoes
  • Peppers
  • Beans

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Fennel in Greene County, AL?

Greene County is in Zone 8b with an average last frost of March 20. Plan your Fennel planting based on this frost date — see the calendar above for exact timing.

What planting zone is Greene County, AL?

Greene County, Alabama is in USDA Hardiness Zone 8b. The average last spring frost is March 20 and first fall frost is November 11.

When should I plant Fennel in Greene County, AL?

In Greene County, AL, plant Fennel after the last frost (around March 20) and before the first frost (around November 11). Best results when soil holds above 50°F.

What growing zone is Greene County, AL for Fennel?

Greene County sits in USDA Zone 8b. Fennel grows reliably in zones 4a through 10b, so it's a good fit here.

Can Fennel grow in Greene County's climate?

Yes — Fennel grows well in Greene County's temperate climate. Greene County averages a 236-day frost-free season, with last frost around March 20 and first frost around November 11.

🌱

Your Greene County Garden Planner — Free

A 22-page printable planner built for Greene 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.

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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 Greene County, AL. Local conditions may vary. Last updated: July 2026.

Sources & credits

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