Front porch plants and swallowtails

My front porch is now surrounded by butterfly bush, dill, fennel, hollyhocks and some potted plants (obscured by the dill). Every summer butterflies and bees are attracted to the plants and swallowtails, especially, love the fennel. Last year dozens of caterpillars metamorphosed into butterflies. The viburnum above had at least 11 different insects on the blossoms this morning. The small flowers smell wonderful and the odor wafts into the open window.