You Will Get 10 Seeds Salvia Leucantha Mexican Bush Sage. It is a beautiful plant that gets clusters of unique flowers that are blue and great green foliage.. These beautiful plants are perennials and are hardy to zone 7, and they grow best in full sun to part shade and they can also be grown as annuals in colder climates.. They would make excellent additions to your rare plant collection, or just make a unique statement in your yard.