T.N.
I don't cut my roses back til very early spring. I think our winters here in upstate NY are similar to yours, right? I cut them back mid March or so and work an all purpose weed and feed in around the roots.
Hollyhocks are biennial so whether you cut them back or not you may have a ZILLION next year or you may have none. Depends how long they've been there. Depending on the variety they may reseed themselves so watch what "weeds" you pull out in the spring.
:)