Lavender, Sage, Coneflower, Black Eyed Susan, Butterfly Bush, and Shasta Daisy among other things in my garden. It depends on your area, though, since different butterfly species like different plants. Employees at the two garden centers I go to are great about sharing tips for plants that attract butterflies and hummingbirds. Often the plants have a tag that shows a little butterfly symbol if they attract butterflies in your area.