Arlyn, that's a good point about giving them some shade after potting. I hadn't thought about it, but did keep the pots in filtered shade on the deck for the first week, more out of it being a handy place to water them, but I'm sure the shade was helpful to the plants too.
Paul, that's interesting how your potted plants clumped up so much faster- good to know!
I'm so bad about crowding my beds, in late summer it's often too much of a jungle to make room for Irises. This year I've kept the beds more tame and tidy, so that's not the issue so much, but I do like watching them get a good head start before being set in the garden. It's been several years since I've purchased new Irises, and I've really enjoyed the incentive to get beds cleaned up and ready for new babies- guess I need to order a few every year, LOL.