Blog

When to Plant Fennel (herb) in Ellsworth County, KS

Ellsworth County, Kansas Zone 6b May

May in the garden — Ellsworth County, Kansas

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

Avg. last frost April 15
Avg. first frost October 23
Soil temp (4") 63°F
Watering Moderate
Pest pressure Low
Daylight 14.1 hrs
  1. Sow fennel (herb) in trays indoors

    Your window is short. These crops want several weeks of indoor growth before they go outside.

To set up a strong June, finish these tasks
  • First harvests: fennel (herb)

Instant PDF download. No spam, unsubscribe any time.

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.

Ellsworth County, Kansas is in USDA Zone 6b. The average last spring frost is April 15 and the first fall frost is October 23, giving you a growing season of approximately 191 days.

At an elevation of 659 feet, Ellsworth County receives approximately 21.5 inches of rainfall annually with predominantly loam soil. Summer highs average 90°F, providing good warmth for Fennel (herb) during the growing season.

Ellsworth County, KS (Zone 6b) Moderate season
191 days
Last Spring Frost April 15
191 growing days
First Fall Frost October 23
Share this guide:

Ellsworth County Soil Profile

Soil Type

Loam

Soil pH

6.2-7.6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (61 days to spare)
Start indoors: Mar 8 Transplant: Apr 5 🍅 Harvest: Jun 7 – Aug 16
Recommended (50%) ✓ Fits season (65 days to spare)
Start indoors: Mar 11 Transplant: Apr 8 🍅 Harvest: Jun 10 – Aug 19
Safe Start (90%) ✓ Fits season (63 days to spare)
Start indoors: Mar 24 Transplant: Apr 21 🍅 Harvest: Jun 23 – Sep 1

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 Ellsworth County

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

Soil pH

Your soil pH (6.2–7.6) overlaps with Fennel (herb)'s range (5.5–7.0), though not a perfect match.

Soil Texture

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

Organic Matter

Organic matter is moderate (3.8%). 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)

3
successive plantings in your 191-day season

Sow every 6.9 weeks. Last sowing by Jul 25 to harvest before frost.

For a dedicated fall crop, sow by Aug 14.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.5″/week
You supply
0.6″/week
Watering frequency 1-2 times/week
Season total 1,075 gal / 100 sq ft
Drought risk

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

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 0.5" 0" ❄️ Dormant
Feb 0.8" 0" ❄️ Dormant
Mar 1.2" 0" ❄️ Dormant
Apr 4.3" 2.1" 2.2" 🚿 Regular watering
May 4.3" 3" 1.3" 💧 Light watering
Jun 4.3" 3.8" 0.5" 💧 Light watering
Jul 4.3" 2.6" 1.7" 💧 Light watering
Aug 4.3" 2.8" 1.5" 💧 Light watering
Sep 4.3" 2.2" 2.1" 💧 Light watering
Oct 4.3" 1.3" 3" 🚿 Regular watering
Nov 0.7" 0" ❄️ Dormant
Dec 0.5" 0" ❄️ Dormant

Water needs are for active growing months only (Apr–Oct in Ellsworth 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 ~1,312 GDD — county provides 3,342 GDD Excellent fit

Fennel (herb) Planting Timeline — Ellsworth County, KS

Fennel (herb) Planting Calendar

Activity When Date Range
Start Indoors March 11 Mar 11 – Mar 25
Transplant Outdoors April 8 Apr 8 – Apr 22
Direct Sow April 1 Apr 1 – Apr 22
Harvest June 10 Jun 10 – Aug 19
Fall Sowing August 14 Aug 14 – Aug 28

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

Month-by-Month Timeline

MonthActivities
January
February
March Start Indoors
April Transplant Outdoors Direct Sow
May
June Harvest
July Harvest
August Fall Sowing Harvest
September
October
November
December
Share this guide:

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · 1-2 times/week

📅 Days to Maturity

60–90 days

🧪 Soil pH

Needs 5.5–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 6b

📆 Growing Season

191 days in Ellsworth County

Growing Tips for Fennel (herb) in Ellsworth County

Direct sow Fennel (herb) outdoors after April 15 in Ellsworth County when soil has warmed and frost danger has passed.

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.

Ellsworth County receives only 22" of rain annually. Fennel (herb) needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.

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 Ellsworth County, KS?

Ellsworth County is in Zone 6b with an average last frost of April 15. Plan your Fennel (herb) planting based on this frost date — see the calendar above for exact timing.

What planting zone is Ellsworth County, KS?

Ellsworth County, Kansas is in USDA Hardiness Zone 6b. The average last spring frost is April 15 and first fall frost is October 23.

🌱

Your Ellsworth County Garden Planner — Free

A 24-page printable planner built for Ellsworth County (Zone 6b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

Instant PDF download. No spam, unsubscribe any time.

Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Ellsworth County, KS. 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.