When to plant Edamame in Mitchell County, IA
Mitchell County gardeners should plant Edamame between May 10 and May 31 in spring. With Mitchell County's Zone 5a climate (last frost May 3), Edamame needs 75–100 days to mature — plant by June 29 for a full harvest.
When to Plant Edamame in Mitchell County, IA
Your August planting checklist for Mitchell County, Iowa
Your garden in Mitchell County, Iowa is working on a schedule, even when you're not. Here's where you should be this August.
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Bring in the edamame
If you can't use it all right away, check the food-preservation section of your planner.
Get ahead of September
- First harvests: edamame
Edamame are soybeans harvested at the immature green stage for a sweet, nutty snack. They are high in protein and easy to grow in warm climates.
Mitchell County, Iowa is in USDA Zone 5a. The average last spring frost is May 3 and the first fall frost is October 7, giving you a growing season of approximately 157 days.
At an elevation of 506 feet, Mitchell County receives approximately 36.1 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84°F, so choose short-season varieties of Edamame to ensure they mature before fall.
Mitchell County Soil Profile
Soil Type
Silt Loam
Soil pH
5.9-7.3
Drainage
Well Drained
Edamame 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 Mitchell County
How your county's soil matches Edamame's growing requirements.
Soil pH
Your soil pH (5.9–7.3) overlaps with Edamame's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Mitchell County is excellent for Edamame — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is excellent (5.1%) — Edamame will thrive.
How to Plant Edamame
Succession Planting Edamame
Sow every 8.6 weeks. Last sowing by Jun 29 to harvest before frost.
Edamame Water Budget
Monthly Watering Guide for Edamame
Edamame 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 | Edamame Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.4" | 0" | ❄️ Dormant |
| Feb | — | 1.5" | 0" | ❄️ Dormant |
| Mar | — | 2.7" | 0" | ❄️ Dormant |
| Apr | — | 3.3" | 0" | ❄️ Dormant |
| May | 3.9" | 4" | 0" | ✅ Rainfall sufficient |
| Jun | 3.9" | 5.1" | 0" | ✅ Rainfall sufficient |
| Jul | 3.9" | 3.9" | 0" | ✅ Rainfall sufficient |
| Aug | 3.9" | 3.9" | 0" | ✅ Rainfall sufficient |
| Sep | 3.9" | 2.9" | 1" | 💧 Light watering |
| Oct | 3.9" | 2.4" | 1.5" | 💧 Light watering |
| Nov | — | 2.8" | 0" | ❄️ Dormant |
| Dec | — | 2" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Oct in Mitchell County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Edamame 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.
Edamame Planting Timeline — Mitchell County, IA
Edamame Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | May 10 | May 10 – May 31 |
| Harvest | July 26 | Jul 26 – Sep 6 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Direct Sow |
| June | — |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.9"/week · Natural rainfall sufficient
📅 Days to Maturity
75–100 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 5a
📆 Growing Season
157 days in Mitchell County
Growing Tips for Edamame in Mitchell County
Direct sow Edamame outdoors after May 03 in Mitchell County when soil has warmed and frost danger has passed.
Common pests for Edamame 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 soil is warm. Do not over-fertilize with nitrogen. Harvest when pods are plump and bright green but before they start to yellow. Steam or boil pods before eating.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Edamame in Other Locations
Frequently Asked Questions
When should I plant Edamame in Mitchell County, IA?
Mitchell County is in Zone 5a with an average last frost of May 3. Plan your Edamame planting based on this frost date — see the calendar above for exact timing.
What planting zone is Mitchell County, IA?
Mitchell County, Iowa is in USDA Hardiness Zone 5a. The average last spring frost is May 3 and first fall frost is October 7.
When should I plant Edamame in Mitchell County, IA?
In Mitchell County, IA, plant Edamame after the last frost (around May 3) and before the first frost (around October 7). Best results when soil holds above 50°F.
What growing zone is Mitchell County, IA for Edamame?
Mitchell County sits in USDA Zone 5a. Edamame grows reliably in zones 3a through 10b, so it's a good fit here.
Can Edamame grow in Mitchell County's climate?
Yes — Edamame grows well in Mitchell County's temperate climate. Mitchell County averages a 157-day frost-free season, with last frost around May 3 and first frost around October 7.
Your Mitchell County Garden Planner — Free
A 22-page printable planner built for Mitchell County (Zone 5a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.