Do you even call it a pup? LOL. How big does it have to be before I can separate it?

Think in terms of a year from now! It's called an *increase*.

I've heard them called babies, or children, but never a pup. hehe!

Seaecho, those variegated increase quickly. I started with 2 fans and by the end of it first season I had nine!

I've heard the term used ...as in, "When this iris has pups, you can have one !". As Mary Ann said, it will be ready to "separate " much later...probably next year. It might....and probably would...survive if separated now, and "babied" a little, but it's chances "increase" as the 'increase" gets larger, and develops it's own , viable root system.

Thanks, everyone! I'll wait until next year then!