When to Plant Edamame in Lincoln County, AR
Your May gardening checklist
Welcome to May in Zone 8b. These are the moves that will have the biggest impact on your growing season.
A few tasks this May that'll pay off in June
- 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.
Lincoln County, Arkansas is in USDA Zone 8b. The average last spring frost is March 19 and the first fall frost is November 9, giving you a growing season of approximately 235 days.
At an elevation of 535 feet, Lincoln County receives approximately 49.3 inches of rainfall annually with predominantly silt loam soil. Summer highs average 94°F, providing good warmth for Edamame during the growing season.
Lincoln County Soil Profile
Soil Type
Silt Loam
Soil pH
5.7-7.1
Drainage
Well Drained
Plant 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 Lincoln County
How your county's soil matches Edamame's growing requirements.
Soil pH
Your soil pH (5.7–7.1) overlaps with Edamame's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Lincoln County is excellent for Edamame — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (3.0%). Annual compost additions will help Edamame.
How to Plant Edamame
Succession Planting Edamame
Sow every 8.6 weeks. Last sowing by Aug 01 to harvest before frost.
Plant 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 | — | 4.4" | 0" | ❄️ Dormant |
| Feb | — | 3.8" | 0" | ❄️ Dormant |
| Mar | 3.9" | 4.9" | 0" | ✅ Rainfall sufficient |
| Apr | 3.9" | 3.9" | 0" | ✅ Rainfall sufficient |
| May | 3.9" | 3.5" | 0.4" | 💧 Light watering |
| Jun | 3.9" | 4.6" | 0" | ✅ Rainfall sufficient |
| Jul | 3.9" | 5" | 0" | ✅ Rainfall sufficient |
| Aug | 3.9" | 4.8" | 0" | ✅ Rainfall sufficient |
| Sep | 3.9" | 3.4" | 0.5" | 💧 Light watering |
| Oct | 3.9" | 3" | 0.9" | 💧 Light watering |
| Nov | 3.9" | 4.1" | 0" | ✅ Rainfall sufficient |
| Dec | — | 3.8" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Lincoln 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 — Lincoln County, AR
Edamame Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | March 26 | Mar 26 – Apr 16 |
| Harvest | June 11 | Jun 11 – Jul 23 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Direct Sow |
| April | Direct Sow |
| May | — |
| June | Harvest |
| July | Harvest |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.9"/week · Only during dry spells
📅 Days to Maturity
75–100 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 8b
📆 Growing Season
235 days in Lincoln County
Growing Tips for Edamame in Lincoln County
Direct sow Edamame outdoors after March 19 in Lincoln 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 Lincoln County, AR?
Lincoln County is in Zone 8b with an average last frost of March 19. Plan your Edamame planting based on this frost date — see the calendar above for exact timing.
What planting zone is Lincoln County, AR?
Lincoln County, Arkansas is in USDA Hardiness Zone 8b. The average last spring frost is March 19 and first fall frost is November 9.
Your Lincoln County Garden Planner — Free
A 24-page printable planner built for Lincoln County (Zone 8b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.