Why do you have to dig them up?
You don't have to cut irises after they bloom. I just leave mine and they do fine. (Just my way of doing it...others have their own ways.)
I know with cannas they have to be lifted in the fall in colder climates, but the other ones are all perenials and survive just fine without lifting.
hope this helps

karri25, I am in also in zone 7. Your lillies and Iris will be just fine left in the ground. The only thing I cut down are the spent blooms and stalks, I leave the foliage.

The cannas are iffy. I do know someone who has a few overwinter but they are in a protected area next to the house. I have to lift mine (learned the hard way)

To lift the cannas I wait until fall when it starts dying back. Remove the leaves and put the tubers in a cardboard boxe and leave them in the shed. They have always done fine. My ex-MIL puts hers in 5 gallon buckets in the shed and hers do fine also. I just always worried that in the buckets they might rot.

Good luck

carey

karri,
Are you wanting to give someone some or do you want to move them or divide????More information, I'm also in zone 7 and my cannas do fine left outside.
Martha

okay,
for irisis this is what i done I planted mine in plasitic crayon containers with cut outs in them you know for the roots to go through and put dirt and everything in and around them, when you first planted your iris they will be fine you really don
t have to divided them unitl like the 2 and third year of having them what you do is put the plant up by digging up around it very carfully not to damage the bulbs pull it up divide the bulbs the ones you want oto store put in a brown paper bag and store in a dark cool place like your garage if you have one. then to plant back some bulbs take a mound of dirt in the hole and drape the roots over the mound and be sure to remove the leaves and everything do this only during the fall when they start to go dormant for winter but during the spring u can leave the leave on and cover back up with dirt but if its fall dont plant it too far down or else they will rot! i dont know what to tell you on the others