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When to Plant Fennel (herb) in Jones County, MS

Jones County, Mississippi Zone 8b May

This month in Jones County, Mississippi

Your garden in Jones County, Mississippi is working on a schedule, even when you're not. Here's where you should be this May.

Avg. last frost March 8
Avg. first frost November 15
Soil temp (4") 71°F
Watering Low
Pest pressure High
Daylight 13.6 hrs
  1. Collect fennel (herb) at their peak

    This is the payoff month. Bring a basket, bring a friend, and get into the beds.

June prep starts now
  • First harvests: fennel (herb)

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Herb fennel is grown for its aromatic leaves, stalks, and seeds rather than a bulb. It has a strong anise flavor and its flowers attract beneficial insects.

Jones County, Mississippi is in USDA Zone 8b. The average last spring frost is March 8 and the first fall frost is November 15, giving you a growing season of approximately 252 days.

At an elevation of 392 feet, Jones County receives approximately 58.9 inches of rainfall annually with predominantly clay loam soil. Summer highs average 96°F, so Fennel (herb) may need afternoon shade and extra watering during peak heat. Clay soil retains moisture well for Fennel (herb), but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Fennel (herb) root diseases.

Jones County, MS (Zone 8b) Long season
252 days
Last Spring Frost March 8
252 growing days
First Fall Frost November 15
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Jones County Soil Profile

Soil Type

Clay Loam

Soil pH

5.4-6.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (124 days to spare)
Start indoors: Jan 27 Transplant: Feb 24 🍅 Harvest: Apr 28 – Jul 7
Recommended (50%) ✓ Fits season (126 days to spare)
Start indoors: Feb 1 Transplant: Mar 1 🍅 Harvest: May 3 – Jul 12
Safe Start (90%) ✓ Fits season (118 days to spare)
Start indoors: Feb 25 Transplant: Mar 25 🍅 Harvest: May 27 – Aug 5

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 Jones County

How your county's soil matches Fennel (herb)'s growing requirements.

Soil pH

Your soil pH (5.4–6.2) overlaps with Fennel (herb)'s range (5.5–7.0), though not a perfect match.

Soil Texture

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

Drainage

Drainage is adequate for Fennel (herb).

Organic Matter

Organic matter is moderate (2.8%). Annual compost additions will help Fennel (herb).

How to Plant Fennel (herb)

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

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

Succession Planting Fennel (herb)

5
successive plantings in your 252-day season

Sow every 6.9 weeks. Last sowing by Aug 17 to harvest before frost.

For a dedicated fall crop, sow by Sep 06.

Plant Water Budget

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

Monthly Watering Guide for Fennel (herb)

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

Month Fennel (herb) Needs Rainfall You Supplement Action
Jan 4.5" 0" ❄️ Dormant
Feb 4.6" 0" ❄️ Dormant
Mar 4.3" 6.3" 0" ✅ Rainfall sufficient
Apr 4.3" 4.9" 0" ✅ Rainfall sufficient
May 4.3" 4" 0.3" 💧 Light watering
Jun 4.3" 4.8" 0" ✅ Rainfall sufficient
Jul 4.3" 6.5" 0" ✅ Rainfall sufficient
Aug 4.3" 5.5" 0" ✅ Rainfall sufficient
Sep 4.3" 4.4" 0" ✅ Rainfall sufficient
Oct 4.3" 4.1" 0.2" 💧 Light watering
Nov 4.3" 4.8" 0" ✅ Rainfall sufficient
Dec 4.6" 0" ❄️ Dormant

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

Fennel (herb) 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 (herb) needs ~1,650 GDD — county provides 5,544 GDD Excellent fit

Fennel (herb) Planting Timeline — Jones County, MS

Fennel (herb) Planting Calendar

Activity When Date Range
Start Indoors February 1 Feb 1 – Feb 15
Transplant Outdoors March 1 Mar 1 – Mar 15
Direct Sow February 22 Feb 22 – Mar 15
Harvest May 3 May 3 – Jul 12
Fall Sowing September 6 Sep 6 – Sep 20

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

Month-by-Month Timeline

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

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · Natural rainfall sufficient

📅 Days to Maturity

60–90 days

🧪 Soil pH

Needs 5.5–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 8b

📆 Growing Season

252 days in Jones County

Growing Tips for Fennel (herb) in Jones County

Direct sow Fennel (herb) outdoors after March 08 in Jones County when soil has warmed and frost danger has passed.

With Jones County's clay soil (30% clay), work in 3-4 inches of compost before planting Fennel (herb). Avoid tilling when soil is wet to prevent compaction.

With summer highs reaching 96°F in Jones County, provide afternoon shade for Fennel (herb) and water deeply in the morning.

Common pests for Fennel (herb) 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 spring or fall. Unlike Florence fennel, herb fennel does not form a bulb. Harvest fronds as needed and seeds when they turn brown. Self-sows readily.

Companion Planting

Good Companions

Avoid Planting Near

  • Tomatoes
  • Peppers
  • Green Beans

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Fennel (herb) in Jones County, MS?

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

What planting zone is Jones County, MS?

Jones County, Mississippi is in USDA Hardiness Zone 8b. The average last spring frost is March 8 and first fall frost is November 15.

🌱

Your Jones County Garden Planner — Free

A 24-page printable planner built for Jones 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 Jones County, MS. 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.