Hello Martna! Aren't irises incredible! I have many varieties all over my yard and marvel at them every time they bloom!
The best time to dig, divide, and transplant irises is in July and August. So right now!
Irises grow from thick, underground rhizomes. Carefully dig up the iris clumps and cut all leaves back to 1/3 their original height. Wash the soil from the rhizomes with water and cut them apart with a sharp knife. Each division should include a fan of leaves, a healthy, solid rhizome, and several roots. Discard the old, leafless rhizomes from the center of each clump, and all diseased and borer damaged rhizomes.
The best planting sites for irises are fertile, well-drained soils and full sun. In poor soils, add well-rotted manure or compost to the soil before planting.
To plant the irises, dig a hole large enough to hold the rhizome and roots. Build a mound in the center of the hole and place the rhizome on top of the mound and spread its roots in the surrounding trench. Then cover with soil. The rhizome should be just below the soil surface. Be careful not to plant it too deep as it will not bloom for you. Then water each plant thoroughly.
To get a good flower display, plant 3 or more rhizomes of one variety in a group. Space the rhizomes about a foot apart, pointing each fan of leaves away from the others.
The transplanted irises will bloom sparsely the first year. They should be in full bloom in their second and third years.
Good luck and enjoy their beautiful blooms!