August is the perfect time to dig up and replant irises in this area. It's dry enough that they shouldn't rot when replanted, while they become established and the ground settles again.
This group is in a very raised-bed, with a loosely built retaining wall. The bed is about 2 ft high, constructed due to a slope. It is filled with yard soil (clay/sand) mixed with compost.
"Before" - This is the "found" variety, yellow standards with auburn falls. The ground was dry and loose, so they were fairly easy to dig.