Iris ensata Dinner Plate Carrot Cake opens broad, semi-double white flowers with wide lavender-blue margins and golden-yellow centers in early summer. The six-inch blooms sit on upright stems above narrow green foliage, bringing crisp color and vertical structure to damp borders and pond margins.
Grow it in full sun or partial shade in rich, acidic soil that stays consistently moist. Its clump-forming habit suits rain gardens, flowering borders, and cut-flower plantings, while pollinators visit the flowers.
Keep the crown above standing water, mulch to conserve moisture, and divide established rhizomes after flowering. Cut old flower stems when the display ends and remove dying foliage in autumn.