Sesbania punicea, or rattlebox, is a shrubby tree that is native to Argentina and other parts of South America. It can grow up to 15 feet tall and thrives in marshy, wet areas. It is used mainly as an ornamental tree for its interesting leaves and bright red flowers. Sesbania punicea is only hardy through zones 8 to 11, so it cannot handle cool temperatures well. However, planting Sesbania punicea seeds in the right environment will make them grow readily.
Choose a place to plant the Sesbania punicea seeds. Sesbania punicea likes any kind of soil as long as it is moist. Slight acidity is not a problem. Sesbania punicea grows best in full sun, but it can handle partial shade.
Plant Sesbania punicea seeds in the late fall or winter. They can also be planted in the early spring as long as there is no chance of a frost.
Dig holes for the Sesbania punicea seeds. Dig each hole 1 to 2 inches deep.
Place the Sesbania punicea seeds in the holes, one seed per hole, and cover with soil.
Water the soil until it is moist. Keep the soil moist until Sesbania punicea sprouts.