Zone 3 · Corn & Legumes Growing Guide

When to Plant Edamame
in Zone 3

Fresh soybeans harvested when pods are plump and bright green. Addictive straight from the garden. Treat exactly like bush beans but wait longer — harvest when pods feel full.

Plant outdoors
Jun 1 – Jun 15
Start indoors
Direct sow
Last Frost
~May 15
Days to harvest
75–90 days
Difficulty
Easy
Wrong season — Zone 3
Harvest window: Aug – Sep

Planting Calendar

In Zone 3, Edamame should be planted outdoors Jun 1 – Jun 15, after the average last frost date of approximately May 15.

Short-season varieties only (75 days). Direct sow after soil warms to 60°F.

Care Guide

Sunlight
Full sun · 6–8 hrs/day
Watering
Regular
Spacing
4–6 inches
Soil
Well-draining, moderate fertility
Days to maturity
75–90 days
Soil pH
6.0–6.8
plant tip · Zone 3

Short-season varieties only (75 days). Direct sow after soil warms to 60°F.

Feeding Schedule

How often
none needed
Feed type
none
Key timing
n/a

Soybeans fix their own nitrogen. Avoid high-nitrogen feeds. A balanced feed at planting is optional.

Companion Planting for Edamame

What you plant next to edamame makes a real difference — some plants actively help, others compete or attract pests.

Grows well with
  • Carrots
  • Cucumbers
  • Corn
  • Squash
Keep away from
  • Onions
  • Garlic
  • Leeks
  • Fennel

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Common questions

In Zone 3, direct sow edamame outdoors Jun 1 – Jun 15 after your last frost date of approximately May 15. Short-season varieties only (75 days). Direct sow after soil warms to 60°F.
Zone 3 has an average last spring frost of approximately May 15 and a first fall frost around Sep 15. These dates vary by specific location — use your ZIP code in the plant app for precision based on the nearest NOAA weather station.
Good companion crops for edamame include Carrots, Cucumbers, Corn, Squash. Avoid planting near Onions, Garlic, Leeks, Fennel, which can compete for nutrients or attract pests.
Edamame typically takes 75–90 days from transplant or direct sow to harvest in Zone 3. Expected harvest window: Aug – Sep.

Free app · iOS February 2028

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Edamame in other zones
Crop Guides