Midori Star Soybeans with leaves on a white background.
Midori Star Soybean edamame arranged artistically on a black plate surrounded by beans and pods.
A close-up macro view of Midori Star Soybeans in the pod with leaves.
Midori Star Soybeans in a colander on a bed of soybean leaves on a white background.
Midori Star Soybeans in a white bowl surrounded by pods on a white background.
Midori Star Soybeans with leaves on a white background.
Midori Star Soybean edamame arranged artistically on a black plate surrounded by beans and pods.
A close-up macro view of Midori Star Soybeans in the pod with leaves.
Midori Star Soybeans in a colander on a bed of soybean leaves on a white background.
Midori Star Soybeans in a white bowl surrounded by pods on a white background.

Soybean Seeds,
Midori Star

SKU: #SY119Min. seed count: 30
Price
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Description

(Glycine max). An improved version of the beloved Japanese heirloom Midori Giant, Midori Star takes everything that made its predecessor great and refines it. With better seedling vigor and faster emergence, this soybean thrives from start to finish. Its longer harvest window means an abundant supply of plump, vibrant green beans, packed with sweet, nutty flavor. Midori, meaning “green” in Japanese, perfectly reflects the rich color of the beans, whether you’re enjoying them as fresh edamame, making homemade miso, or crafting tofu. One of the largest and earliest soybeans available to home gardeners, Midori Star brings reliability and beauty.

Growing Tips: Soybeans prefer warm, fertile, and well-drained soil with plenty of sunlight. Keep soil evenly moist during germination and flowering but avoid overwatering. Inoculating seeds with a soybean-specific rhizobium bacteria before planting enhances nitrogen fixation and boosts plant vigor. Harvest pods while still bright green and slightly plump for the best flavor and texture in edamame dishes.

Plant Details

Botanical Name
Glycine max
Life Cycle
Annual
Growth Habit
Bush
Sun Requirement
Full sun
Days to Germinate
5–18
Days to Maturity
75–85
Planting Depth
1 in.
Plant Spacing
6 in.
Ideal Temperature
70–90°F
Frost Hardy
No

When to Grow

Plant Midori Star Soybean seeds after all danger of frost has passed and soil temperatures are consistently above 60 F. In regions with short summers, start seeds indoors and transplant once soils warm. Soybeans flower on daylength, so later sowings mature at nearly the same time on smaller plants; grow two or three varieties of different maturity to stagger the fresh edamame harvest. If you're not sure how to find your first and last frost dates, consult our blog post 'Our Experts Answer Questions, Share Resources.'

How to Sow and Plant

Sow seeds 1 inch deep in well-drained soil rich in organic matter. Space seeds 6 inches apart in rows spaced 18–24 inches. Water thoroughly after planting and maintain consistent moisture until seedlings are established. Avoid compacting the soil, as soybeans develop extensive root systems that benefit from aeration and light cultivation.

How to Grow

Once established, soybeans require minimal maintenance. Provide consistent moisture during pod development but reduce watering as pods mature. Avoid high-nitrogen fertilizers, as soybeans fix their own nitrogen through root nodules. Keep weeds under control early in the season, as soybeans do not compete well before canopy closure. Harvest young pods when fully filled but still green for fresh edamame.

How to Save Seeds

  • Allow pods to mature fully on the plant until dry and brittle.
  • Harvest pods before they shatter and remove seeds carefully.
  • Spread beans in a single layer to air-dry for 1–2 weeks.
  • Store in airtight containers in a cool, dry place.
  • Properly stored seeds remain viable for up to 3 years.

FAQ

Can Midori Star soybeans be eaten fresh?

Yes. Harvest pods when they are green and plump for fresh edamame. Simply steam or boil the pods in salted water and enjoy the beans warm.

Do soybeans need fertilizer?

Usually not. When inoculated with rhizobium bacteria, soybeans create their own nitrogen supply. However, adding compost or balanced organic fertilizer can support healthy early growth.

When should I harvest soybeans for seed or dry use?

Wait until pods have turned brown and dry on the plant. Harvest before pods split open, then dry and store the beans in a cool, moisture-free location.

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