My husband and I are in the process of completely re-doing my Mother-in-law's back garden (reseeding the lawn, inserting new beds etc) and I have a question about a rosemary bush she currently has planted (see pic). The two plants (common rue on the left and rosemary on the right) were choked by weeds which I pulled out and it became apparent as I was working that the plants were spaced quite close together and the rosemary was growing its branches to the right, I assume to avoid competition for light with the branches of the rue. I pruned it lightly but ultimately would like to move the bush a few feet to right to give both it and the rue plant a bit of respite. How and when should I transplant it? Is it likely that the roots of both plants are tangled and if so is it safe for both to try and cut the rosemary free? My Mother-in-law is particularly attached to the rue and I would very much like to avoid her wrath should I damage it or worse! :-)