Make sure what you have tracyshed. Hypericum comes in different forms as already stated. If yours is WOODY, looks like a big shrub it's a goodie. If its leafy and low growing it's a baddie....you dont want it.
I have "split" the shrubby, woody hypericum. Sometimes when a shrub is dug up it will,have another root system....maybe layered itself or for another reason. Pull them apart and you have two Shrubs. I think you can safely dig up hypericum and replant it now....I find if doesn't mind being disturbed if replanted reasonably quickly and well watered.