I am in Zone 6b and have about 45 Keppel irises and 3 more ordered. The ones that grow really well in my area are Wintry Sky, Florentine Silk, Haunted Heart, Strawberry Shake, Roaring 20s, Birthday Girl, Bollywood, Nouveau Riche and Fogbound. Some of the others are rather new and have not had a chance to going yet.