Have you buried the rhizomes? They need the sun on them.

Agree - the leaves may be in full sun but it looks like the rhizomes are covered and in the shade from the timber sleeper.

Thanks for your comments. How/when do I transplant the rhizomes? Can I do it now? Do I need to trim the leaves first? Can I expect blooms this season?
Thanks again.

Paul

They are better moved later in the year then you cut the leaves down to about 6" to prevent wind rock. I doubt if they would flower now if you moved them now any way..
Some of my bearded iris are just showing the first hint of a bud forming so you never know you might get some flowers this year.

Lift them, bury the plant so half of the rhizome is on the surface in full sun. replant but as I say cut the leaves down to a 'fan' about 6" big. water well when first planted.

You can do it right now and here's how. Cut the leaf fan back to six to nine inches above soil level. Dig the plant out at a distance far enough from the center( this will take a little guess work) so you are able to remove the whole plant which includes roots and rhizomes. Carefully brush the dirt off the roots and rhizome. Now select a sunny spot (all day with no shadows moving in as the sun travels) with good drainage and dig a hole large enough for the root mass and rhizome to settle in. Not too deep though, the top of the rhizome should be just "kissing" the top of the soil level. Cover with dirt and water well. The reason for cutting the leaf fan back is to allow the iris to put its energy into making a good system of roots. Next year your iris will say " thank you" by flowering around Memorial Day.

No need to disturb the plants. Move the sleepers and brush the soil away to expose the top half of the rhizome.

Thank you everybody for your excellent advice. I will have to transplant. The "sleeper" is an Alaskan Black Spruce. I use it to screen out the neighbors. No more waiting in vane for irises! thanks again!

By sleeper I mean the block of timber in the bottom left corner of the pictures - not the screen fence. Even if you can just roll it away 6-8 inches it will remove the shade from the rhizomes. Of course if the sun moves around in the afternoon and comes over the screen fence then you may need to move the irises if they are shaded by the screen.

Thanks for the explanation. I think relocating the rhizomes is best option as area seems a bit crowded.