Blue porterweed plants produce beautiful deep-blue flowers that butterflies and hummingbirds love. In fact, due to its sweet nectar, blue porterweed is one of their favorite plants of all. This plant is a perennial and bloom for a good portion of the year. Each pack comes with 20 seeds and basic instructions for germination. I’m a USA seller which means faster shipping times as well as higher quality seeds. A vast majority of my seeds either come from my garden, from my neighborhood or in the local area. If not, I’ve acquired them on trips around the country. I’ve tested and grown many of these myself. I’m always here for assistance with germination and growing. Your success is my success!