Japanese iris (Iris ensata) is a striking perennial known for its large, flat flowers with intricate patterns in shades of purple, pink, and white. Blooming in early to mid-summer, it thrives in consistently moist, acidic soil and prefers full sun for optimal flowering. Unlike Siberian iris, Japanese iris requires more water and is ideal for rain gardens, pond edges, and damp borders. Its elegant blooms and tall, upright foliage make it a standout in water-adjacent landscapes.