I, too, have yellow iris seeds from a client's pond. The yellows have not proven invasive at that location nor at my pond.

My two plants didn't even bloom this year. These two were transplants several years ago, and have not "taken off" yet. I plan to plant some of the client's seeds here, too. My pond is so small, 1/4th acre, that I won't have any real trouble controlling the iris if they ever start to spread.

If anyone has surplus seeds from another color of iris, I'll take some too, after nehunter gets what he wants.

Thanks.