Glycine max
vegetableEdamame is the vegetable soybean, harvested young and green when the pods are plump but still tender, then boiled or steamed in the pod as a sweet, nutty, protein-rich snack. The bushy plants set clusters of fuzzy green pods that all ripen within a narrow window, maturing in roughly 75 to 95 days, and unlike most vegetables edamame is a complete protein.
Sun
full sun
Water
Every 3 days
Harvest
~90 days
Difficulty
easy
Lifecycle
annual
One season, then done
Spacing
4-6 in. apart
Planting Depth
1-1.5 in.
Soil pH
6.0-6.8
Soil Type
Average, well-draining
Hardiness Zones
Zones 3 – 9
Grown as an annual — this range is its winter hardiness, but you can grow it for a single season in any zone.
When to Fertilize
Little needed; the plant fixes its own nitrogen
Fertilizer
Low-nitrogen if any
Direct sow after the last frost once the soil has warmed to at least 60F, spacing the bushy plants a few inches apart in full sun; like other legumes, soybeans fix their own nitrogen and need little fertilizer. Because soybeans are sensitive to day length, choose a variety suited to your latitude, and sow the whole patch at once since the pods mature together. Keep moisture steady, especially as the pods fill.
Direct sow
Apr 29
Projected first harvest
Jul 28
Good neighbors that attract beneficial insects or deter pests
Proactive ways to stop trouble before it starts — tap a name with an arrow for its full guide
Row cover young plants and clean up debris that shelters overwintering adults
Encourage ladybugs and lacewings with flowers; rinse colonies off
Handpick and keep weedy field edges mowed
Harvest when the pods are plump, full-sized, and bright green, with the beans nearly touching inside, picking before any yellowing of the leaves or pods. The window is short, only about a week, so check often; pull whole plants or strip the pods, then boil or steam promptly, as quality fades fast after picking.
Edamame is exceptionally nutritious, a complete plant protein containing all nine essential amino acids, and it supplies generous folate, vitamin K, fiber, iron, and beneficial isoflavones, all in young green pods.
For educational and informational purposes only — HomeSown is not medical, health, or other professional advice. Always positively identify any plant before handling or eating it; some plants, and some parts of otherwise-edible plants, are toxic. Consult a qualified professional before consuming or otherwise using any plant, especially if you are pregnant, nursing, taking medication, or have a health condition.