When we bought the house we raised our kids in, my mother-in-law arrived one October day with a bucket of 40 iris tubers. 3 years later – I kid you not – 3 years later when I went to split them out there were over 400! I did that again 3 years later! And they bloomed like crazy! One long full row of purple.
Here, not so much. My sister gave me some of her irises. No blooms – lots of greens but no blooms.

I bought some from a local gardener – one year of blooms and no return the next year. I bought some from a local, very reputable garden center – no blooms the second year and no greens at all the third year.
So I have a plan, and a very good one I hope! I am going to dig out the irises from my sister that don’t bloom here at the townhouse, and plant them at the land up north. I think the soil up there is more like at our old house – rocky, gravelly. Maybe they will bloom there.
First I have to solve my deer grazing dilemna up north, but then we should have a good test.