I got Absolute Treasure two years ago in 2015 and planted it in my prime spot, my raised beds. It bloomed very well in Spring 2016 and by October 2016 it had five big fans and eight increases. In Spring 2017, although all the increases grew into nice big fans, they only produced two bud stalks. So the bloom the second year was a little disappointing.
Since it grew into a big clump, though, I contributed six rhizomes to my club sale and moved the rest to into a spot with poorer soil but more sun, which I thought it could deal with since it is such vigorous increaser. We'll see.
I have one iris which has never bloomed for me, Water Waltz. It also is in my raised beds. It grows
big, beautiful, healthy rhizomes, but will not bloom. This spring will be its third chance. If it doesn't
bloom this next year, it will go to my club sale.
Bonnie has a good point that since the cultivar has never bloomed, I can't be certain it is what I say it is. Whatever it is, I sure would like to see it bloom!
I have three Keppel iris, Raging Tide, Sea Cruise, and French Lilacs, that were slow to bloom, but
were lovely when they finally did and are now among my favorites.