Crotalaria polysperma | Blue Rattlepod | 100 SEEDS - Blue rattlepod | Many-seeded rattlepod These Crotalaria polysperma seeds grow into an enchanting plant known as Blue Rattlepod. Native to tropical regions, Blue Rattlepod thrives in warm climates and adds a splash of color to any garden space.Crotalaria polysperma produces lush green foliage that creates a vibrant backdrop for its delicate blossoms.