Black soybean is a highly nutritious legume crop with black seed coat and rich protein, anthocyanin and mineral content. The beans are widely used for cooking, soybean milk, tofu, fermented foods and sprouting. This 100-gram pack is suitable for home garden planting and small-scale cultivation. When planning your legume garden, you can pair it with 50gram mung bean seeds for planting to diversify your home protein crop selection. Black soybeans thrive in warm, sunny conditions with well-drained fertile soil. They are nitrogen-fixing plants that improve soil health while producing a valuable harvest. The plants are upright and bushy, requiring no trellis support. Daily management includes regular weeding and moderate watering during flowering and pod filling stages. For gardeners interested in sprouting varieties, 150gram/bags mung beans for sprouting provide a fast-harvest sprout option to complement your soybean crop.
Planting Instructions Soil Preparation Choose full-sun location with deep, fertile, well-drained loamy soil. Incorporate compost or well-rotted manure before sowing. Soybeans prefer slightly acidic to neutral soil pH. Avoid waterlogged fields.
Seed Pre-treatment Select plump, undamaged black seeds. Soak in warm water for 6–8 hours to accelerate germination. Rhizobium inoculation can enhance nitrogen fixation and growth. No cold stratification required.
Sowing Method Sow directly after last frost when soil temperature reaches 18–20°C. Plant 2–3 seeds per hole, 2–3 cm deep. Space 10–15 cm between plants, 40–50 cm between rows. Thin to one or two strong seedlings per hole.
Germination Condition Optimal germination temperature is 20–28°C. Seedlings emerge in 7–14 days. Keep soil consistently moist but not waterlogged during germination. Warm soil is essential for rapid, uniform emergence.
Daily Maintenance Water moderately during flowering and pod development. Avoid overhead watering to reduce disease risk. Remove weeds regularly. Black soybeans are self-pollinating. Harvest pods when they turn yellow-brown and dry on the plant. Shell beans and dry thoroughly before storage.
Specification Plant Name: Black Soybean Botanical Name: Glycine max Plant Type: Warm-season annual legume Mature Height: 0.6–1.2 Meters Blooming & Fruiting Period: Flower in mid-summer, pods ripen in autumn Germination Temperature: 20–28°C Growing Temperature: 18°C ~ 35°C, frost-sensitive Light Requirement: Full Sun Soil: Fertile well-drained loam, slightly acidic to neutral pH Planting Difficulty: Easy Core Features: High protein black beans, nitrogen-fixing, anthocyanin-rich, multi-use for food and sprouting
FAQ Q1: What are black soybeans used for? A1: Cooking, soybean milk, tofu, fermented foods, and nutritious sprouting.
Q2: Do black soybeans need a trellis? A2: No, they are upright bush-type plants that do not require support.
Q3: How long from planting to harvest? A3: Approximately 100–130 days depending on variety and climate.
Q4: Can I grow black soybeans in containers? A4: Yes, use large deep containers with good drainage in full sun.
Q5: How do I store harvested black soybeans? A5: Shell fully dry pods, then store beans in airtight container in cool, dry, dark place.
