Did you have success with your new iris planted this year or in the fall? If not, it could be due to several factors: too much shade, too much fertilizer, too deep a planting, or crowding. July is a good time to correct any of these problems by lifting and relocating or repositioning to a more favorable location.
Plant the iris high with the rhizomes along the surface of the dirt. They will be covered finely and lightly with mulch, but not soil. Make sure you can either see the rhizomes or have the ability to brush away the mulch exposing the bulb.
With the exception of Louisiana variety, irises need six to eight hours of sunlight to bloom and require good drainage. If you have a damp, partial sun location in your garden, plant a Louisiana iris.