Iris sibirica (Siberian iris) thrives in moist but well-drained soil and full sun to partial shade. It features slender, grass-like foliage and elegant, upright flowers in shades of blue, purple, and white. It is drought-tolerant once established. Iris ensata (Japanese iris) prefers consistently moist, acidic soil and full sun. It produces large, flat flowers with intricate patterns, often in shades of purple, pink, and white. It is ideal for rain gardens and pond edges. Iris versicolor (blue flag iris) naturally grows in wetland areas and tolerates standing water. Its flowers are typically violet-blue with prominent veining, and it is a great choice for water gardens and boggy sites. Iris pseudacorus (yellow flag iris) is a vigorous species that thrives in wet conditions, including pond margins. It produces bright yellow flowers and can spread aggressively, making it useful for erosion control but requiring management in natural areas. Iris chrysographes (black iris) is a striking species with deep purple to nearly black flowers. It prefers moist, well-drained soil and partial shade, adding dramatic contrast to shaded borders and woodland gardens.