General Plant Information (Edit)
Plant Habit: Vine
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Soil pH Preferences: Moderately acid (5.6 – 6.0)
Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Minimum cold hardiness: Zone 9b -3.9 °C (25 °F) to -1.1 °C (30 °F)
Plant Height: 3 to 5 feet
Leaves: Other: looks like soybean leaves (trifoliolate)
Fruiting Time: Late summer or early fall
Flower Color: White
Bloom Size: Under 1"
Flower Time: Summer
Underground structures: Taproot
Uses: Erosion control
Vegetable
Good as a cover crop
Suitable for forage
Dynamic Accumulator: Nitrogen fixer
Resistances: Drought tolerant
Propagation: Seeds: Needs specific temperature: soil temperature 60 degrees
Days to germinate: 5
Depth to plant seed: 1/2 to 1 inch deep
Sow in situ
Containers: Not suitable for containers

Common names
  • Poor Man's Beans
  • Butter Bean
  • Purple Hyacinth Bean
  • Old Man Beans

Comments:
  • Posted by jmorth (central Illinois) on Nov 1, 2015 6:18 PM concerning plant:
    A white-flowering, twining, aggressive legume that resembles soybeans to some extent, Rongai is used as a forage crop in Australia, Brazil, and Texas and as a food crop in central Africa. It is a Nitrogen fixer useful in crop rotation plans with an indeterminate growth habit. The seeds are buff or pale brown w/ a conspicuous white hilum.

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