Sweet Pea Perennial (Lathyrus latifolius), blooms all summer long and tolerates drought. Enjoy the beauty and fragrance of Sweet Peas without planting every year. The 1.5 inch flowers are a little smaller than other sweet peas and range in color from white to purplish pink to purplish red. Deadhead spent flowers to encourage more summer blooms. The Perennial Sweet Pea prefers full sun, but like as cool a spot as possible. Quantities are per Pound.