Hi Barry,
I would make a small cut on the Hardy chicago, take the tip of a branch off, see if it has any sap running, check to see if it is still green under the outside skin.
The one plant I had outside this past winter is dead to the ground, despite winter protection. Time will tell if it comes up from the roots again.
Fertilize as often as the product you have recommends. Watch how much your plants grow, you do not want long inter-nodal distances. Stop the fertilizing about 4 months before normal dormancy sets in.
That gives the new growth time to harden off before the cold weather sets in.