/OpinionIn the Garden: Regina iris is striking example of species1 / 2 IN THE GARDEN Regina iris 2 / 2 [expand] closeIrises join other perennials in the great flower blooming season of springtime. The Regina iris (Neomarica caerulea “Regina”) is a striking example of the species. The Regina iris is a wider-leafed variety with strong upright blades in a vibrant green that can reach 3-4 feet in height. The Regina iris does best in full sun to partial shade and is slightly drought tolerant, as well as salt tolerant. Its architectural fan shape and sharp leaf blades make it a striking plant on its own and it blends well with the modern architecture currently popular.