move St. John's wort?

I have a shrub that is Hypericum prolificum or common name is shrubby St. John's Wort. I have had it for at least 6+ years in the same location. I am wanting to move it out away from the house some so that I can see it better from inside the house. It is so beautiful and I don't want to lose it. I have been waiting until it is fully dormant to move it. I did read that it blooms on new growth and should be pruned in the early spring, but I have never pruned it. I am thinking that if I move it now I can prune it a little to compensate for the loss of some of the roots. 
I wanted to ask any of you if you have any experience with this shrub?
Thank you for all your help all these years!
Tricia
zone 6b

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