What type of BUTTERFLIES are you trying to attract?
Blue and tiger Swallowtail; Monarch, all of them really
What NECTAR and HOST plants are in your garden?
Salvia, Monarda, Lily, Chrysanthemum, Lycoris, Aster, Crocus, Forsythia, Edgeworthia, Mahonia, Japanese Flowering Apricot, Clover, Vinca, Zinnia, Asclepius, Rosa, Viburnum, Amaryllis, Phlox, Iris, Hemerocallis, Rain Lilies, Peonia, Magnolia, Fothergilla, hundreds more