Hi Sandy, welcome.
Arizona has more USDA hardiness zones than (I think) any state but California, so there are lots of climates here. There are locations where the best time to plant iris and daylilies is "never" because it's just too hot and dry. But in slightly cooler locations, it's much the same time as you would in Kansas. My iris supplier sends roots in August. I think mid March or early April might be a reasonable time for daylilies here, although I have had just a little less success planting them in fall when they are on sale.
I was lucky to have a realtor who is a certified AZ master gardener and was able to ask all sorts of questions about gardening before I moved. Happy I did.
