Some examples of flowers that butterflies like are cosmos, Queen Anne’s lace, zinnia, butterfly weed, coneflowers, New England asters, spearmint, milkweed, yarrow, phlox, ironweed, thistles, verbena, goldenrod, Shasta daisy, coreopsis, black-ey
Remember Hugulkultur in creating raised beds. Since I like the higher beds, filling the bottom half with prunings and such will reduce amount of topsoil needed to fill bed.