Pincushion flowers are considered somewhat old-fashioned but it just goes to show how well loved these perennials are. Flat-bottomed, dome shaped, ruffle-edged flowers stand above finely cut leaves, making it a perfect candidate for sunny cut-flower gardens as well as container planters, hanging baskets, borders, and mass plantings. Butterfly Blue pincushion flower has lovely lavender blue blooms from late spring into the fall, and bees and butterflies love the long blooming season.