Transplanting Roses Nov. 1. Use Root Stimulator? Dormancy?

Hi. I am in Zone 6A. I’ll be transplanting a 20 year-old rose bush on November 1. I’ll be mixing some Black Kow manure into the soil while I do it. Should I water the bush with a root stimulator even though the rose bush will sit dormant until the spring (about 6 months from now)? I have some BONIDE “GARDEN RICH ROOT & GROW.’ It is a “IBA ROOT STIMULATOR.’ 4-10-3. Do rose bush roots need a stimulator right before they go dormant… right after a transplant… for 6 cold months? I do not know what kind of rose it is. It is coming from my deceased aunt’s former house. THANK YOU for any advice!!!!! Eric

Welcome!
In my opinion a root stimulator would be a good idea for a rose planted in the fall. If any new top growth appears, I would prune that back. That would only freeze in the winter and you don't want the plant trying to leaf. You want the roots to grow instead.