Green Soybean (Edamame)
Glycine max
📖 About this plant
Green soybean, known globally as Edamame (the Japanese word meaning “stem beans”), is the immature green form of the soybean plant (Glycine max). A member of the Fabaceae (legume) family, soybean is one of the most important protein crops in the world and has been cultivated in China for over 3,000 years. Edamame refers to the young green soybeans harvested before they harden and turn yellow — at this stage they are tender, sweet, and nutty, prized in Japanese, Chinese, Korean, and increasingly Indian and Western cuisines. The plant is a bushy annual that fixes atmospheric nitrogen through symbiotic rhizobium bacteria in its root nodules, making it an excellent crop for improving soil fertility. Soybean is a nutritional powerhouse — green edamame is rich in complete plant protein (about 11% by weight), dietary fiber, folate, vitamin K, iron, magnesium, and isoflavones (phytoestrogens being studied for cardiovascular, bone, and hormonal health benefits). The beans are typically boiled or steamed in their pods and lightly salted, served as a snack or appetizer. They are also shelled and added to stir-fries, salads, soups, and rice bowls. In India, soybean is widely grown as an oilseed crop in Madhya Pradesh, Maharashtra, and Rajasthan; edamame as a fresh vegetable is a more recent introduction in urban markets and home gardens.
🧑🌾 Care requirements
Full sun
Regular, keep soil moist
Moderate (50-70%)
20-30°C
Well-draining loam; pH 6.0-7.0
Inoculate with rhizobium; light feeder (fixes nitrogen)
📋 Plant facts
- 🌍 Origin
- East Asia (China)
- 📏 Max height
- 60-90 cm
- 📐 Spread
- 30-45 cm
- 🕰️ Bloom time
- Summer; small white/purple pea-like flowers
- 🎨 Bloom color
- White, pink, or purple
- 🍃 Foliage color
- Bright green trifoliate leaves
- ⏳ Lifespan
- Annual (1 season)
- 📈 Growth rate
- Fast — harvest in 70-90 days
- ☠️ Toxicity
- Non-toxic; must be cooked before eating
- 🌱 Propagation
- Seeds (direct sow)
🛡️ Health & Safety
Non-toxic; must be cooked before eating
Common issues
- Soybean rust, bacterial pustule, aphids, bean leaf beetles, pod borers, root knot nematodes, damping-off in seedlings, manganese deficiency in alkaline soils
💡 Care tips
- Direct sow seeds after soil has warmed to 15°C, 2.5 cm deep and 10 cm apart in rows 45-60 cm apart. Inoculate seeds with rhizobium bacteria before planting to boost nitrogen fixation. Plant in full sun in well-draining fertile soil. Keep soil consistently moist, especially during flowering and pod-filling. Avoid overhead watering to reduce disease. Mulch to retain moisture and suppress weeds. Side-dress with compost if needed, but avoid heavy nitrogen fertilizer — the plant fixes its own. Harvest edamame when pods are plump and bright green but still flexible, before they yellow — typically 70-90 days from sowing. To harvest, pull the whole plant or pick individual pods. Boil or steam pods for 5-7 minutes in salted water and squeeze beans out to eat. Successive sowings every 2-3 weeks extend the harvest. Rotate with non-legume crops to maximize soil benefits.
