Belonging to the Glycine genus (Glycine max 'Butterbean'), Butterbean is a variety of Soybean. Butterbean grows as an Annual and is a Vegetable. Being an Annual, it tends to grow best over the course of a single year. Butterbean normally grows to a max height of 1.98 feet (61.0 cm metric).
This variety plant info is provided by the myfolia gardener's wiki. All details about Butterbean have been kindly provided by our members.
How to grow Butterbean
Plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Butterbean is thought of as half hardy, so remember to protect this plant from frosts and low temperatures.
Growing Butterbean from seed
Try to aim for a seed spacing of at least 1.49 inches (3.81 cm) and sow at a depth of around 0.99 inches (2.54 cm). Soil temperature should be kept higher than 18°C / 64°F to ensure good germination.
As Butterbean is half hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.