Botanical Name: Glycine max
Days to Maturity: 60–70 days
Native: Eastern Asia
Hardiness: Frost-sensitive annual
Plant Dimensions: 24"–30" tall, wide
Variety Information: 'Chiba Green' is an early-harvest variety that produces large, dark green pods, a high percentage containing three beans. Beans have a nutty, earthy flavor.
When to Sow Outside: RECOMMENDED. 1 to 2 weeks after your average last frost date, and when soil temperature is at least 65°F, ideally 70°–85°F. Successive Sowings: Every 7 to 14 days up to 80 days before your average first fall frost date. NOTE: In very hot summer areas, skip sowing as high heat approaches; temperatures consistently above 90°F will prevent soybeans from forming.
When to Start Inside: Not recommended; bean seedlings are sensitive to root disturbance.
Days to Emerge: 10 days
Seed Depth: 1"
Seed Spacing: A group of 2 seeds every 4"
Row Spacing: 24"
Thinning: When 1" tall, thin to 1 every 4"
Harvesting: To enjoy edamame as a shelling bean, harvest when pods get plump, but are still green; the whole plant may be pulled up. To harvest as a dry soybean, wait about another month, until 90% of the leaves have fallen off, and pods are hard. Pull up the whole plant, hang it in a dry place and allow to completely dry out. Place dried pods in a bag and shake seeds out of pods.