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When to plant Kale in Weldon, IL

Plant Kale in Weldon, when soil hits 50°F — usually April 1. Continue planting through April 22 for the spring crop. A second sowing from August 8 to August 22 extends the harvest into fall.

When to Plant Kale in Weldon, IL

Kale
DeWitt County, Illinois Zone 6a August

August in the garden — DeWitt County, Illinois

August rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in DeWitt County, Illinois.

Avg. last frost April 15
Avg. first frost October 17
Soil temp (4") 80°F
Watering Moderate
Pest pressure High
Daylight 13.6 hrs
  1. It's harvest week for kale

    Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.

  2. Get kale in for a late-season harvest

    Mid-season soil is hot. Sow a bit deeper than the packet suggests to find cooler, damper ground.

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Kale is an exceptionally hardy, nutrient-dense green available in curly, lacinato, and Russian varieties. It tolerates heavy frost and often tastes sweeter after cold exposure.

Weldon, Illinois is in USDA Zone 6a. The average last spring frost is April 15 and the first fall frost is October 17, giving you a growing season of approximately 185 days.

At an elevation of 801 feet, DeWitt County receives approximately 31.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84°F, so choose short-season varieties of Kale to ensure they mature before fall.

Weldon, IL (Zone 6a) Moderate season
185 days
Last Spring Frost April 15
185 growing days
First Fall Frost October 17

Weldon Soil Profile

Soil Type

Silt Loam

Soil pH

6.1-7

Drainage

Well Drained

Kale Planting Risk Windows

Early Start (70% safe) ✓ Fits season (72 days to spare)
Start indoors: Mar 6 Transplant: Apr 10 🍅 Harvest: Jun 5 – Jul 31
Recommended (50%) ✓ Fits season (73 days to spare)
Start indoors: Mar 11 Transplant: Apr 15 🍅 Harvest: Jun 10 – Aug 5
Safe Start (90%) ✓ Fits season (75 days to spare)
Start indoors: Mar 24 Transplant: Apr 28 🍅 Harvest: Jun 23 – Aug 18

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 Weldon

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

Soil pH

Your soil pH (6.1–7.0) is within Kale's preferred range (6.0–7.5).

Soil Texture

The silt loam soil in DeWitt County is excellent for Kale — good drainage, moisture retention, and nutrient holding capacity.

Drainage

Drainage is adequate for Kale.

Organic Matter

Organic matter is excellent (5.0%) — Kale will thrive.

How to Plant Kale

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 Kale

4
successive plantings in your 185-day season

Sow every 5.7 weeks. Last sowing by Aug 08 to harvest before frost.

For a dedicated fall crop, sow by Aug 08.

Kale Water Budget

Plant needs
0.8″/week
Rainfall provides
0.7″/week
You supply
0.3″/week
Watering frequency 1-2 times/week
Season total 524 gal / 100 sq ft

Monthly Watering Guide for Kale

Kale 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 Kale Needs Rainfall You Supplement Action
Jan 1.4" 0" ❄️ Dormant
Feb 1.2" 0" ❄️ Dormant
Mar 2.3" 0" ❄️ Dormant
Apr 3.5" 2.6" 0.9" 💧 Light watering
May 3.5" 4.1" 0" ✅ Rainfall sufficient
Jun 3.5" 4.3" 0" ✅ Rainfall sufficient
Jul 3.5" 3.2" 0.3" 💧 Light watering
Aug 3.5" 3.6" 0" ✅ Rainfall sufficient
Sep 3.5" 2.7" 0.8" 💧 Light watering
Oct 3.5" 2.3" 1.2" 💧 Light watering
Nov 2.1" 0" ❄️ Dormant
Dec 2" 0" ❄️ Dormant

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

Kale 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.

Kale needs ~780 GDD — county provides 2,405 GDD Excellent fit

Kale Planting Timeline — Weldon, IL

Kale Planting Calendar

Activity When Date Range
Start Indoors March 11 Mar 11 – Mar 25
Transplant Outdoors April 15 Apr 15 – Apr 29
Direct Sow April 1 Apr 1 – Apr 22
Harvest June 10 Jun 10 – Aug 5
Fall Sowing August 8 Aug 8 – Aug 22

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.8"/week · 1-2 times/week

📅 Days to Maturity

50–70 days

🧪 Soil pH

Needs 6–7.5 · Your soil: ideal

🗺️ USDA Zone

Zone 6a

📆 Growing Season

185 days in DeWitt County

Growing Tips for Kale in Weldon

Direct sow Kale outdoors after April 15 in DeWitt County when soil has warmed and frost danger has passed.

Common pests for Kale in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.

General growing tips

Direct sow or transplant in early spring or late summer. Harvest outer leaves first to keep plants productive. Kale overwinters in many climates and can provide greens all year.

Companion Planting

Good Companions

Avoid Planting Near

  • Strawberries
  • Tomatoes

Check more plant combinations with our Companion Planting Checker →

🌾 Save Your Own Kale Seeds
Life Cycle Biennial
Pollination Cross-Pollinated (insects)
How to Collect Allow 2nd year flower stalks to dry. Harvest pods when tan.
Storage Store airtight; viable 5 years at 35°F, under 50% humidity.

Isolate 1/2 mile from other brassicas (broccoli, cabbage, etc.) — they all cross.

When should I plant Kale in Weldon, IL?

In Weldon, IL, plant Kale after the last frost (around April 15) and before the first frost (around October 17). Best results when soil holds above 50°F.

What growing zone is Weldon, IL for Kale?

Weldon sits in USDA Zone 6a. Kale grows reliably in zones 2a through 11b, so it's a good fit here.

Can Kale grow in Weldon's climate?

Yes — Kale grows well in Weldon's temperate climate. Weldon averages a 185-day frost-free season, with last frost around April 15 and first frost around October 17.

🌱

Your DeWitt County Garden Planner — Free

A 22-page printable planner built for DeWitt County (Zone 6a). 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 DeWitt County, IL. Local conditions may vary. Last updated: August 2026.