A beautiful perennial flower, Purpletop Verbena (also called Vervain) is quick to become a gardener's favorite. Long, slender, woody stems sway in the breeze, and are topped by clusters of purple flowers that are irresistible to butterflies and hummingbirds. Purpletop Verbena reaches 3-5 ft. tall, with a long-blooming season (early summer to fall) and low-maintenance qualities (drought tolerant and easy to grow). 1/4 g. seed packet Name: Purpletop Verbena Botanical Name: Verbena bonariensis Life Cycle: Perennial Color: Purple Height: 36-60″ Light Requirement: Full Sun Planting Instructions: Sow outdoors 1 to 2 weeks after average last frost, or 1 to 2 weeks before average first fall frost. Can also be started indoors 6 weeks before average last frost. *requires darkness to germinate - you can achieve this by either making sure the seeds are planted at a depth of approximately 4x the size of the seed (if starting outdoors), or covering pots with dark plastic until germination.