The Siberian Iris Ottawa, 'Iris', is an exotic Siberian Iris that is sure to draw attention in the months of May and June in your garden. The rich violet flowers fade into a lilac-white throat with a tiger-striped black and yellow at the base of each petal. A nice flash of color in any garden. Siberian Iris are elegant, easy to grow, and make stunning cut flowers. They thrive in almost every garden environment. They prefer wet soils at the margins of ponds, and are hardy even in the coldest areas. Use to prevent erosion on difficult banks or provide handsome vertical accents in the border. They are graceful when established in broad drifts in an open area. Planted in groups of 3 or more, they will eventually form large clumps.