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When to plant Leeks in Anderson County County,

For Leeks in Anderson County County, the safe spring window opens around March 28 and closes around April 18. Last expected frost is April 11, first fall frost October 24, giving a 196-day growing season. A second sowing from August 15 to August 29 extends the harvest into fall.

When to Plant Leeks in Anderson County, KS

Leeks
Anderson County, Kansas Zone 6b June

Your June game plan for Anderson County, Kansas

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Avg. last frost April 11
Avg. first frost October 24
Soil temp (4") 74°F
Watering Low
Pest pressure High
Daylight 14.6 hrs
Looking ahead to July
  • First harvests: leeks

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Leeks are a mild, sweet allium that produces long white shanks. They are more refined than onions and are a key ingredient in soups, stews, and gratins.

Anderson County, Kansas is in USDA Zone 6b. The average last spring frost is April 11 and the first fall frost is October 24, giving you a growing season of approximately 196 days.

At an elevation of 466 feet, Anderson County receives approximately 23.3 inches of rainfall annually with predominantly loam soil. Summer highs average 86°F, providing good warmth for Leeks during the growing season.

Anderson County, KS (Zone 6b) Moderate season
196 days
Last Spring Frost April 11
196 growing days
First Fall Frost October 24

Anderson County Soil Profile

Soil Type

Loam

Soil pH

6.5-7.4

Drainage

Well Drained

Leeks Planting Risk Windows

Early Start (70% safe) ✓ Fits season (27 days to spare)
Start indoors: Mar 1 Transplant: Apr 5 🍅 Harvest: Jul 5 – Sep 20
Recommended (50%) ✓ Fits season (28 days to spare)
Start indoors: Mar 7 Transplant: Apr 11 🍅 Harvest: Jul 11 – Sep 26
Safe Start (90%) ✓ Fits season (33 days to spare)
Start indoors: Mar 18 Transplant: Apr 22 🍅 Harvest: Jul 22 – Oct 7

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 Anderson County

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

Soil pH

Your soil pH (6.5–7.4) overlaps with Leeks's range (6.0–7.0), though not a perfect match.

Soil Texture

The loam soil in Anderson County is excellent for Leeks — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is excellent (4.4%) — Leeks will thrive.

How to Plant Leeks

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

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

Leeks Water Budget

Plant needs
0.8″/week
Rainfall provides
0.5″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 629 gal / 100 sq ft
Drought risk

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

Monthly Watering Guide for Leeks

Leeks 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 Leeks Needs Rainfall You Supplement Action
Jan 0.6" 0" ❄️ Dormant
Feb 0.7" 0" ❄️ Dormant
Mar 1.4" 0" ❄️ Dormant
Apr 3.5" 2.3" 1.2" 💧 Light watering
May 3.5" 3.9" 0" ✅ Rainfall sufficient
Jun 3.5" 3.8" 0" ✅ Rainfall sufficient
Jul 3.5" 2.5" 1" 💧 Light watering
Aug 3.5" 2.9" 0.6" 💧 Light watering
Sep 3.5" 2.2" 1.3" 💧 Light watering
Oct 3.5" 1.7" 1.8" 🚿 Regular watering
Nov 0.8" 0" ❄️ Dormant
Dec 0.6" 0" ❄️ Dormant

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

Leeks 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.

Leeks needs ~1,740 GDD — county provides 2,842 GDD Excellent fit

Leeks Planting Timeline — Anderson County, KS

Leeks Planting Calendar

Activity When Date Range
Start Indoors March 7 Mar 7 – Mar 21
Transplant Outdoors April 11 Apr 11 – Apr 25
Direct Sow March 28 Mar 28 – Apr 18
Harvest July 11 Jul 11 – Sep 26
Fall Sowing August 15 Aug 15 – Aug 29

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

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.8"/week · 1-2 times/week

📅 Days to Maturity

90–150 days

🧪 Soil pH

Needs 6–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 6b

📆 Growing Season

196 days in Anderson County

Growing Tips for Leeks in Anderson County

Direct sow Leeks outdoors after April 11 in Anderson County when soil has warmed and frost danger has passed.

Common pests for Leeks in this region include onion maggots and thrips. Use row covers early in the season and inspect plants weekly.

General growing tips

Start seeds indoors 10-12 weeks before last frost. Transplant into trenches and hill soil around stems as they grow to increase the white portion. Harvest as needed.

Companion Planting

Good Companions

Avoid Planting Near

  • Peas
  • Green Beans

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Leeks in Anderson County, KS?

Anderson County is in Zone 6b with an average last frost of April 11. Plan your Leeks planting based on this frost date — see the calendar above for exact timing.

What planting zone is Anderson County, KS?

Anderson County, Kansas is in USDA Hardiness Zone 6b. The average last spring frost is April 11 and first fall frost is October 24.

When should I plant Leeks in Anderson County, ?

In Anderson County, , plant Leeks after the last frost (around April 11) and before the first frost (around October 24). Best results when soil holds above 50°F.

What growing zone is Anderson County, for Leeks?

Anderson County sits in USDA Zone 6b. Leeks grows reliably in zones 3a through 10b, so it's a good fit here.

Can Leeks grow in Anderson County's climate?

Yes — Leeks grows well in Anderson County's temperate climate. Anderson County averages a 196-day frost-free season, with last frost around April 11 and first frost around October 24.

🌱

Your Anderson County Garden Planner — Free

A 22-page printable planner built for Anderson 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.

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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 Anderson County, KS. Local conditions may vary. Last updated: June 2026.

Sources & credits

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