As much as I love looking at Iris in bloom, I also like to look at the soil the Iris are planted in, so always look for those photo's that include the entire clump of iris, including the 'dirt', and look to see what type of soil the iris are growing in. Some photo's look like the rhizomes are planted in pure "Dusty Dirt"
and others look like the soil is more composted and organic.
I'm amazed at the Iris that bloom in that old 'dusty dirt' type of soil. Their blooms are gorgeous!