Cutting back Iris. This tickles me, only because it brings back memories..........I mentioned here, before, I developed a hatred for Irises when I was very young. This is because I did all the yard work for my mom. Mom worked very hard to feed us..........mom worked, I mowed, dad skipped! Anyway, I digress..............after they had bloomed I mowed every Iris I could find to the ground.......no special way of cutting, just hacked em down with the mower. They came back every year.......THICKER! Now, that I have some, I wouldn't think of doing that.

I don't cut mine back at all - speaking of Bearded Iris - I just toss them in the driveway and stomp on them! LOL! Just kidding. I really don't do anything about them, except pull off the dead leaves. I know if you move them, you are supposed to cut about 2/3 of the foliage off because then the energy goes into roots for the rhizomes, rather than maintaining the foliage. Don't know about the others.

Susan

LOL
Sorrel, mowing was my ex mother-in-laws method of "deadheading" what she called the "flags" in NW Oklahoma.
But she never watered or fertilized anything. If plants lived, great. If not, great. The iris did better some years than others, but they were really hardy!
It was amazing, BTW, to see their pecan tree, planted on a gyp rock cap to begin with, double its size in one year once it had drip line and some mulch. The dern thing went from 5 feet tall (after ten years!) to 10-15 feet in one season!
Amazing what a little TLC will do.

I don't usually do much of anything with my bearded Iris, except dig and divide them once every 3 years or so. Every now and then I'll pull off the dead leaves, or even cut back the foliage if it looks really bad, but mostly I just leave them alone.