Iris spuria hybrids, commonly named Butterfly Iris, are native to Europe, from England to North Iran and into Pakistan depending on the subspecies. It has characteristics similar to Siberian iris, but it is taller 2 to 3 feet, has broader leaves and larger. Large flowers are borne on a short spike for a few weeks in Summer. The flowers are consisting of 3 sepals and 3 petals. Most common colors are blue-purple to lilac, but additional colors are readily available, including white orange and yellow. Flowers best in hot Summers.You will find the Spuria to be another variety of Iris that will give you excellent cut flowers. The leaves are broader than on most varieties of Iris. The plant spreads by means of its modified stems, rhizomes, which are located below the soil surface. Hardiness zones 3-9, (-37øC/-35øF, -5øC/25øF) in Winter. The growing conditions for the Spuria are not that demanding. These do best in full sun with a neutral to slightly alkaline pH and a well drained soil. They prefer a rich soil and plenty of moisture until they are done blooming. After they are finished with their blooming period they should be allowed to dry out as they seem to appreciate this during their resting period.