My Property

I live in Westphalia, KS on 6 acres of land (mostly trees). Some websites say that I live in Hardiness zone 5 some say zone 6 and others say zone 5b. Are there different zone classes based on the subject? (ie livestock, flowers, trees, etc.)

Already on the property when we moved in are two old fashioned rose bushes and this bush that I am not sure of the name of. If anyone call tell what it is or would like a zoomed in picture, let me know.
Since moving in I have transplanted quite a few irises that have not yet bloomed. This will be the third year for them so I have my fingers crossed that they will begin to bloom this year. I have also planted a magnolia tree that is going to start its third year.

Last season I planted a Double Delight rosebush, a hydrangea, foxglove, lilies, and some phlox. In some planters I planted Dinnerplate Dahlias and some other assorted plants like begonias, but I didn't know that I should have dug up the tubers and taken seeds from the dahlia so those plants are a loss.