When to Plant Edamame in Fresno County, CA
What to do in May
Each item below is timed to Fresno County, California's frost dates and soil temperatures. Skip nothing, stress about nothing.
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Bring in the edamame
Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.
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.
Fresno County, California is in USDA Zone 9b. The average last spring frost is March 2 and the first fall frost is November 23, giving you a growing season of approximately 266 days.
At an elevation of 2,276 feet, Fresno County receives approximately 14.9 inches of rainfall annually with predominantly loam soil. Summer highs average 100°F, so Edamame may need afternoon shade and extra watering during peak heat. With low rainfall, drip irrigation is essential for growing Edamame successfully. Mulch heavily to conserve soil moisture.
Fresno County Soil Profile
Soil Type
Loam
Soil pH
6.5-7.5
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 Fresno County
How your county's soil matches Edamame's growing requirements.
Soil pH
Your soil pH (6.5–7.5) overlaps with Edamame's range (6.0–7.0), though not a perfect match.
Soil Texture
The loam soil in Fresno County is excellent for Edamame — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (3.2%). Annual compost additions will help Edamame.
How to Plant Edamame
Succession Planting Edamame
Sow every 8.6 weeks. Last sowing by Aug 15 to harvest before frost.
Plant Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
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 | — | 2.8" | 0" | ❄️ Dormant |
| Feb | — | 3.3" | 0" | ❄️ Dormant |
| Mar | 3.9" | 2.3" | 1.6" | 💧 Light watering |
| Apr | 3.9" | 1" | 2.9" | 🚿 Regular watering |
| May | 3.9" | 0.4" | 3.5" | 🚿 Regular watering |
| Jun | 3.9" | 0.1" | 3.8" | 🚿 Regular watering |
| Jul | 3.9" | 0" | 3.9" | 🚿 Regular watering |
| Aug | 3.9" | 0" | 3.9" | 🚿 Regular watering |
| Sep | 3.9" | 0.2" | 3.7" | 🚿 Regular watering |
| Oct | 3.9" | 0.6" | 3.3" | 🚿 Regular watering |
| Nov | 3.9" | 1.3" | 2.6" | 🚿 Regular watering |
| Dec | — | 2.8" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Fresno 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 — Fresno County, CA
Edamame Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | March 9 | Mar 9 – Mar 30 |
| Harvest | May 25 | May 25 – Jul 6 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Direct Sow |
| April | — |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.9"/week · 2-3 times/week
📅 Days to Maturity
75–100 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 9b
📆 Growing Season
266 days in Fresno County
Growing Tips for Edamame in Fresno County
Direct sow Edamame outdoors after March 02 in Fresno County when soil has warmed and frost danger has passed.
With summer highs reaching 100°F in Fresno County, provide afternoon shade for Edamame and water deeply in the morning.
Common pests for Edamame in this region include bean beetles and aphids. Use row covers early in the season and inspect plants weekly.
Fresno County receives only 15" of rain annually. Edamame needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.
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
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Check more plant combinations with our Companion Planting Checker →
Edamame in Other Locations
Frequently Asked Questions
When should I plant Edamame in Fresno County, CA?
Fresno County is in Zone 9b with an average last frost of March 2. Plan your Edamame planting based on this frost date — see the calendar above for exact timing.
What planting zone is Fresno County, CA?
Fresno County, California is in USDA Hardiness Zone 9b. The average last spring frost is March 2 and first fall frost is November 23.
Your Fresno County Garden Planner — Free
A 24-page printable planner built for Fresno County (Zone 9b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.