Most species of poppies are short-lived perennials or annuals that happily self-seed in any sunny border, the exception to this is the longer lived Papaver orientale (Oriental Poppy). The Oriental Poppies are blooming in my garden and have large clumps of coarse, hairy foliage, with enormous satiny flowers in late spring. They are nice in the garden, but will go completely dormant after flowering, therefore you need to plant something nearby that gets bushy in the summer to fill in the gap.
There are several good seed strains available in shades of orange, salmon, and red with a dark zone or eye in the middle of the flower. Many named hybrids also exist, these are propagated from root cuttings and include both single and double flowering forms in shades of orange, pink, white and deep red.
They will somethings come bicolored or with exotically fringed petals.
Good drainage is crucial for the poppy particularly where winters are wet and all species prefer lighter soils and a warm, sunny location. These requirements make them an excellent addition to my garden.