Iris is a versatile perennial with sword shaped foliage and striking flowers that bloom in spring and early summer. Iris germanica is valued for its large colourful flowers and prefers a sunny position with well drained rather dry soil. Iris sibirica has slender foliage and graceful blooms and thrives in slightly moist soil. Iris ensata stands out for its very large flowers and is especially suitable for moist gardens and waterside planting.