When to plant Green Beans in Putnam County County,
Spring Green Beans in Putnam County County goes in April 28–May 19, once nighttime temps stop dipping near freezing.
When to Plant Green Beans in Putnam County, IL
June to-do list for Putnam County, Illinois
Welcome to June in Zone 5b. These are the moves that will have the biggest impact on your growing season.
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It's harvest week for green beans
Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.
Looking ahead to July
- First harvests: green beans
Green beans are a warm-season staple available as bush or pole types. Bush beans produce a concentrated harvest while pole beans provide a longer picking season.
Putnam County, Illinois is in USDA Zone 5b. The average last spring frost is April 21 and the first fall frost is October 13, giving you a growing season of approximately 175 days.
At an elevation of 582 feet, Putnam County receives approximately 41.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87°F, providing good warmth for Green Beans during the growing season.
Putnam County Soil Profile
Soil Type
Silt Loam
Soil pH
6-6.7
Drainage
Well Drained
Green Beans Planting Risk Windows
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 Putnam County
How your county's soil matches Green Beans's growing requirements.
Soil pH
Your soil pH (6.0–6.7) is within Green Beans's preferred range (6.0–7.0).
Soil Texture
The silt loam soil in Putnam County is excellent for Green Beans — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Green Beans.
Organic Matter
Organic matter is excellent (4.3%) — Green Beans will thrive.
How to Plant Green Beans
Succession Planting Green Beans
Sow every 5.7 weeks. Last sowing by Aug 09 to harvest before frost.
Green Beans Water Budget
Monthly Watering Guide for Green Beans
Green Beans needs approximately 0.9 inches of water per week (3.9" per month). Here's how your county's rainfall compares month by month.
| Month | Green Beans Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.8" | 0" | ❄️ Dormant |
| Feb | — | 2" | 0" | ❄️ Dormant |
| Mar | — | 3.1" | 0" | ❄️ Dormant |
| Apr | 3.9" | 3.6" | 0.3" | 💧 Light watering |
| May | 3.9" | 4.3" | 0" | ✅ Rainfall sufficient |
| Jun | 3.9" | 5.2" | 0" | ✅ Rainfall sufficient |
| Jul | 3.9" | 5" | 0" | ✅ Rainfall sufficient |
| Aug | 3.9" | 4.3" | 0" | ✅ Rainfall sufficient |
| Sep | 3.9" | 3.3" | 0.6" | 💧 Light watering |
| Oct | 3.9" | 3.3" | 0.6" | 💧 Light watering |
| Nov | — | 3.2" | 0" | ❄️ Dormant |
| Dec | — | 2.5" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Putnam County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Green Beans 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.
Green Beans Planting Timeline — Putnam County, IL
Green Beans Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | April 28 | Apr 28 – May 19 |
| Harvest | June 23 | Jun 23 – Aug 18 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Direct Sow |
| May | Direct Sow |
| June | Harvest |
| July | Harvest |
| August | Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.9"/week · Only during dry spells
📅 Days to Maturity
50–65 days
🧪 Soil pH
Needs 6–7 · Your soil: ideal
🗺️ USDA Zone
Zone 5b
📆 Growing Season
175 days in Putnam County
Growing Tips for Green Beans in Putnam County
Direct sow Green Beans outdoors after April 21 in Putnam County when soil has warmed and frost danger has passed.
Common pests for Green Beans in this region include bean beetles and aphids. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow after last frost when soil is warm. Provide sturdy supports for pole varieties. Pick beans regularly when young and tender to encourage continued production.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Avoid harvesting during damp weather. Isolate 25 ft between varieties.
Green Beans in Other Locations
Frequently Asked Questions
When should I plant Green Beans in Putnam County, IL?
Putnam County is in Zone 5b with an average last frost of April 21. Plan your Green Beans planting based on this frost date — see the calendar above for exact timing.
What planting zone is Putnam County, IL?
Putnam County, Illinois is in USDA Hardiness Zone 5b. The average last spring frost is April 21 and first fall frost is October 13.
When should I plant Green Beans in Putnam County, ?
In Putnam County, , plant Green Beans after the last frost (around April 21) and before the first frost (around October 13). Best results when soil holds above 50°F.
What growing zone is Putnam County, for Green Beans?
Putnam County sits in USDA Zone 5b. Green Beans grows reliably in zones 3a through 11b, so it's a good fit here.
Can Green Beans grow in Putnam County's climate?
Yes — Green Beans grows well in Putnam County's temperate climate. Putnam County averages a 175-day frost-free season, with last frost around April 21 and first frost around October 13.
Your Putnam County Garden Planner — Free
A 22-page printable planner built for Putnam 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.