Some people have been asking about what this is. I'm hoping someone can come along with a better description of it than I can.

Dee?

And I know Dee suggested to put some dirt on top of the irises you suspect bloomed out, to try to make them increase.

The two irises that bloomed out on me that I vividly remember were NICHE and SECRET RECIPE. And it's so sad because you get such a beautiful bloom cycle just before, and I guess that just exhausts the plant. But I remember that a few years ago a friend dug up and gave me her HELLO DARKNESS because she wanted to dispose of it, and I divided the clump and gave rhizomes to a few people, and a few of them had absolutely no increase but had the remnants of a stalk, but I gave them away anyway -- and later they developed increase and carried on! So I recommend that if you really, really want the rhizome that has bloomed out, give it several months to a year to see if it will increase later on. I have to get rid of (give away) many plants each year to make room for all the new ones I've ordered, so I usually just dispose of any that have bloomed out now.

Irises bloom on the increases. Old rhizome will make new increases, but not rebloom. Therefore 'bloomout' occurs when no new increases are made.

I had two really, really teeny tiny rhizomes that much to my great surprise bloomed. But they had had no increases so I figgured they were gonners. I know I posted about it and was advosed to leave then and not pull and toss them. I had figgured they were done for. But much to my surprise DESIUGNER LABEL did put out a new increase not long after blooming. Now I see that the other DOUBLE DOWN also has two tiny increases growing and I thought that one was a gonner for sure.

They can really surprise you!

That DID really surprise me. I really was ready to toss them.