Cinta, I'm not taking Spring Hills anything as gospel, LOL. I've grown the hardy glads, and that's what they actually look like. I just thought that was a good pic of them.
Cinta, you can be our test person. We'll make you report every year how they do, and I hope they do well for you.
We're in similar zones, and probably similar conditions as you get a lot of snow there too. My daughter and I both grow the non hardy glads AKA hybrid glads and they return most years. I have not had much luck with what they call the perennials, but a few came back.
Here's some of the hybrid glads my daughter grew, and it's the third year for them. As you'll see the shape of them is more like Priscilla than the hardy glads at Spring Hills.
