I bought these irises for my front yard this summer from Lowes. They did not come with a tag they only came with a white stick with their name on it. My question is what zone are they hardy to. I am in zone 3/4 and I just want to know what to do for it this winter. Also by any small chance are they rebloomers. Oh and I have no pics of the flowers I really didn't think about it while they were blooming.

The cha cha Hume is white with lavender streak in the center. The other- strut and Flourish hume is a deep purple with yellow I think.