A new cultivar of Dianthus plant named ‘WP15 PIE45’ that is characterized by large single flowers with an apricot-khaki colored eye delimited by a bright red-orange line, deep fimbriated petal edges, medium sweet fragrance, blooming from May through October, a compact mounding habit, glaucous blue green foliage and that is suitable for use as a flowering plant in pots and containers as well as for use as a cut flower and in bouquets, is disclosed.
