The winter blooming Iris or grass Iris makes us smile as the intense purple/blue flowers with intricate yellow and white markings appear sporadically from November to spring. Grassy upright green foliage offers some weather protection for the flowers which come off and on in mild stretches. Not over the top showy but the individual flowers are stunning at a time of the year when stunning is in short order. Spreads to form evergreen colonies in full sun and well drained soil. Little supplemental water once established. High deer resistance. Long, long lived perennial persisting in old gardens for decades. Place it where you can see it in the winter. Near an entrance for example Mediterranean.