I ordered from Wild Iris Rows last year. They weren't the largest rhizomes I've received but in most cases they sent multiples. They also let me place a smaller order then their minimum and happily adjusted the shipping.

I have not ordered from Hildebrandt's, but I was happy with my order from Wild Iris Rows. I don't think the rhizomes were the size of Schreiner's, but they grew well and bloomed the first year.
I have been happy with all of the big iris sellers- Cooley's, MidAmerica, Sutton's, Schreiner's, and with others like Stanton and Napa Country Iris. So many are good, it is hard to list them all. It's nice to buy from a grower in your area- they will have irises that do well in your climate, I believe.
Renee

I had looked at Scheiners but their pricing was a bit high compared to other growers with the same plant, I have heard they send BIG rhizomes though.
Well I ordered 19 from wild row, they were very nice and freindly to work with.

Still have some other iris I would like to get so still shopping.

I did buy some last year from a place that also sells daylilies along with iris and will not order from them again, they were very tiny and too many subs.

I order from Wild Iris Rows and as daylilyluver said, they send multiples of most varieties ordered. I'm very pleased with them and have yet to order from anywhere else.

Em