Both will do fine, maeve, but wait until later in the season and take cuttings from "new growth" (semi hard wood) which is easier to root... "Root Tone" is a great product, comes in a powder form and so when you take your cuttings just dip the bottom in the root tone...

I would use a medium that has some pearlite in it and a miz of potting soil and whatever soil they are growing in now... Put them in baggies with twist ties at the top with some but not soaking mointure... The baggies will act as a greenhouse and if you have a grow light or florescent bulb and an area that doesn't freeze that will do juts fine... If not, put them up next to your house on the north side of the house after the last frost... Once they have rooted then they can take more sun...

As for irises, we move and divide then any time we feel like it... They are very tough to hurt or kill... Kinda like alot of day lillies...

BTW, anyone using "hychonecloa" (high-conna-clo-ah) (sp?) grasses??? Great little grass for bordering beds that is out there...

B~