Sometimes I pot up irises that are going into my established beds because I don't have the beds cleared enough in July for them. That way they can be rooting and putting on some growth until early fall when everything is clipped back. Also there are lots of growing seasons when July and August are really hot and dry here, and its just easier to keep them watered and cared for in pots until cooler fall weather. Not the case this year though- they're going directly into the garden this year, and I'm trying to keep the beds from getting too chaotic.