Japanese irises have different colored flowers and look depending on their cultivar. Here's a shortlist of our favorite cultivars to give you an idea of what's out there. 1. Alpine Majesty The Alpine Majesty is recognized by the Royal Horticultural Society as a top-quality plant, bestowing its Award of Garden Merit. This cultivar has big white flowers with yellow throats. These Japanese irises can go up to 40 inches (101.6 centimeters) in height and usually blooms starting in the earlier part to the middle part of summer. 2. Blue Spritz Another award winner, the Blue Spitz has two layers of ruffled petals with a faint blue and violet color. It can grow up to 35 inches (88.9 centimeters) and blooms early in the summer, right through the middle months. The Blue Spitz has been given the Payne Medal in 2005 and retains the distinction of being the top recognized Japanese iris cultivar by the American Iris Society. 3. Agripinella This Japanese iris can have large blooms that can go up to eight inches (20.3 centimeters) across. Their flowers have a rose-pink hue that is slightly ruffled with a white and yellow blotch at the center. Not only are their flowers huge, but Agripinella can grow up to 36 inches (91.4 centimeters) in height. A single stem can hold anywhere from a single to three flowers. 4. Coho While most Japanese irises have a bluish to purple tint or white, Coho dares to be different with its large pink petals. This cultivar is known to grow to a height of up to 38 inches (96.5 centimeters). This cultivar was also a Payne Medal awardee in 2012. 5. Frilled Enchantment The Frilled Enchantment has ruffled white flowers that are bordered by a magenta or lilac ribbon. This cultivar can grow up to 42 inches (106.7 centimeters) tall and is a recipient of the RHS Award of Garden Merit. 6. Pink Frost The gently frilled pink frost has pink and lavender flowers accentuated by white blotches and a yellow throat. This cultivar blooms midseason and grows up to 30 inches (76.2 centimeters) tall. 7. Carol Johnson is cultivar can catch anybody’s eye with its big single flowers that have purple to plum colors with golden yellow tiny throats. Carol Johnson can spread up to two inches (5.1 centimeters) and grow up to 32 inches (81.3 centimeters). 8. Iris Ensata Variegata Variegated Japanese irises have silvery or whitish leaves and dark purple flowers. If you want a unique Japanese iris growing in your backyard, this is the one you should choose. The silver foliage and dark purple blooms are not meant to be hidden, as this cultivar can grow up to 35 inches. It also stays variegated throughout the whole season.