A self-set Buddlea has grown in front of the garage door. We've tried everything to move it. We dug out all the roots that we could find. When that didn't work - with the alternative being to dig under the floor of the garage - we hammered copper nails into its roots. Still, it refused to die.
Or did it.
Last year it was the colour of a common Buddlea. This year it is the purest white. I think it's a ghost.