I've just moved to a new house and to my utter horror, the backgarden is overrun with (i) mint; (ii) borage or comfrey (not sure which). The mint I'm trying to dig little by little (and mercifully is coming out, though we'll see whether new seedlings emerge from my digging).
However, I'm completely bewildered as to what to do with the borage or comfrey (I'm not sure which it is to be honest). It is nettle like (and you need to use gloves when dealing with it), the roots are extremely deep and thick, (and I've not remotely got to the roots of the plants when digging) and has blue / purple flowers. I'm so sorry for the number of questions I have here but here goes:
(1) The borage / comfrey (whatever it is) seems very invasive but with all my digging I cannot get at the root. What should I do, and will they continue to grow? I've read some websites encouraging these plants for the bees, but it is taking over the whole garden!
(2) I've also put some into my compost -- yet I've read that some allotments strictly forbid comfrey into their compost because it will infect the whole lot and come up again. Should I sift through all my compost (!!!) and get as much of this out?
I've already clipped all the flowering buds to ensure it doesn't self seed any further (which, unfortunately has done so everywhere in the garden). I suppose I'll simply need to hoe these small plants and hope the plant gets exhausted and dies eventually.
When we moved into this place the previous owners said they planted a 'wild flower garden' - little did I know it was a euphemism for 'letting it run amok' with invasive plants!!!!