Crotalaria quinquefolia | 100 SEEDS - Rattlebox | Rattleweed These Crotalaria quinquefolia seeds grow into a striking climbing plant admired for its lush foliage and vibrant flowers. Gardeners appreciate it for its ability to quickly cover fences or trellises, creating natural green walls.Crotalaria quinquefolia produces abundant, bright yellow blossoms that bloom profusely during the growing season.