I just looked in the database for self white irises. I'm still new at this two so I really don't know your answer. The only thing I would make sure is to check out if they already have child plants registered. At least that way you know if they are fertile.
Bubbly Mood looks nice and has child plants (no pictures of the child plants so I don't know if any of them are white).
Other ATPer's said to check the pedigree of the Iris.
Sorry I can't be more help.
