Soybean 'Edamame'

Plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Edamame is thought of as half hardy, so protect with a row cover whenever the temperatures drop.

Do not soak overnight. The seeds will rot.

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.

Ensure that temperatures are mild and all chance of frost has passed before planting out, as Edamame is a half hardy plant.

http://en.m.wikipedia.org/wiki/Edamame