The Sweet Pea In the Pink, 'Lathyrus odoratus', is a designer blend of warm shades of pink and highlights of salmon, almond, cerise and mauve. SweetPeas have 1 to 2 inch flowers that are romantically fragrant and are wonderful cut flowers in bunches. In the Pink generally bloom for 3 to 5 weeks. In warm climates, plant in October through January for spring bloom. They are used for cut flowers, ground cover, and wall coverings if given the proper support.