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When to plant Medlar in Kane County, IL

Kane County's short 177-day growing season means one Medlar planting between May 14 and May 28. No fall crop in Zone 5b.

When to Plant Medlar in Kane County, IL

Kane County, Illinois Zone 5b June

Your June planting checklist for Kane County, Illinois

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

Avg. last frost April 23
Avg. first frost October 17
Soil temp (4") 68°F
Watering Low
Pest pressure High
Daylight 15 hrs

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Medlar is a small ornamental tree producing unusual open-ended fruits that must be bletted (softened by frost) before eating. The flavor is complex, like spiced apple butter.

Kane County, Illinois is in USDA Zone 5b. The average last spring frost is April 23 and the first fall frost is October 17, giving you a growing season of approximately 177 days.

At an elevation of 699 feet, Kane County receives approximately 35.2 inches of rainfall annually with predominantly silt loam soil. Summer highs average 85°F, providing good warmth for Medlar during the growing season.

Kane County, IL (Zone 5b) Moderate season
177 days
Last Spring Frost April 23
177 growing days
First Fall Frost October 17

Kane County Soil Profile

Soil Type

Silt Loam

Soil pH

6.1-6.8

Drainage

Well Drained

Medlar Planting Risk Windows

Early Start (70% safe) ✓ Fits season
Transplant: May 9
Recommended (50%) ✓ Fits season
Transplant: May 14
Safe Start (90%) ✓ Fits season
Transplant: May 31

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 Kane County

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

Soil pH

Your soil pH (6.1–6.8) is within Medlar's preferred range (6.0–7.5).

Soil Texture

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

Organic Matter

Organic matter is moderate (4.0%). Annual compost additions will help Medlar.

How to Plant Medlar

120"
Between Plants
144"
Between Rows

Medlar Water Budget

Plant needs
1.0″/week
Rainfall provides
0.8″/week
You supply
0.2″/week
Watering frequency Only during dry spells
Season total 311 gal / 100 sq ft
Drought risk

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

Monthly Watering Guide for Medlar

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

Month Medlar Needs Rainfall You Supplement Action
Jan 1.5" 0" ❄️ Dormant
Feb 1.7" 0" ❄️ Dormant
Mar 2.5" 0" ❄️ Dormant
Apr 4.3" 3.4" 0.9" 💧 Light watering
May 4.3" 4.5" 0" ✅ Rainfall sufficient
Jun 4.3" 3.8" 0.5" 💧 Light watering
Jul 4.3" 4.2" 0.1" 💧 Light watering
Aug 4.3" 3.8" 0.5" 💧 Light watering
Sep 4.3" 2.9" 1.4" 💧 Light watering
Oct 4.3" 2.7" 1.6" 💧 Light watering
Nov 2.2" 0" ❄️ Dormant
Dec 2" 0" ❄️ Dormant

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

Medlar 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.

Medlar needs ~20,075 GDD — county provides 2,433 GDD May not mature

Medlar Planting Timeline — Kane County, IL

Medlar Planting Calendar

Activity When Date Range
Transplant Outdoors May 14 May 14 – May 28

· 120" apart · Rows 144" apart

Month-by-Month Timeline

MonthActivities
January
February
March
April
May Transplant Outdoors
June
July
August
September
October
November
December

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · Only during dry spells

📅 Days to Maturity

1095–1825 days

🧪 Soil pH

Needs 6–7.5 · Your soil: ideal

🗺️ USDA Zone

Zone 5b

📆 Growing Season

177 days in Kane County

Growing Tips for Medlar in Kane County

Direct sow Medlar outdoors after April 23 in Kane County when soil has warmed and frost danger has passed.

Your 177.0-day growing season in Kane County is tight for Medlar (1095.0-1825.0 days to maturity). Start indoors and choose early-maturing varieties.

General growing tips

Plant in well-drained soil. Medlars are self-fertile and need minimal pruning. Harvest after the first frost and allow to soften (blet) indoors for 2-3 weeks before eating.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Medlar in Kane County, IL?

Kane County is in Zone 5b with an average last frost of April 23. Plan your Medlar planting based on this frost date — see the calendar above for exact timing.

What planting zone is Kane County, IL?

Kane County, Illinois is in USDA Hardiness Zone 5b. The average last spring frost is April 23 and first fall frost is October 17.

When should I plant Medlar in Kane County, IL?

In Kane County, IL, plant Medlar after the last frost (around April 23) and before the first frost (around October 17). Best results when soil holds above 50°F.

What growing zone is Kane County, IL for Medlar?

Kane County sits in USDA Zone 5b. Medlar grows reliably in zones 4a through 8b, so it's a good fit here.

Can Medlar grow in Kane County's climate?

Yes — Medlar grows well in Kane County's temperate climate. Kane County averages a 177-day frost-free season, with last frost around April 23 and first frost around October 17.

🌱

Your Kane County Garden Planner — Free

A 22-page printable planner built for Kane County (Zone 5b). 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 Kane County, IL. Local conditions may vary. Last updated: June 2026.

Sources & credits

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