Lemon balm/mint?

I bought a foxglove from a garden centre earlier this year - the foxglove is pretty poor but thought that a very strong weed had grown up against the root. Pulled at the plant to pull it up and an overwhelming smell of lemon came off of it. The leaves look like my mint herb but smell completely of lemon. Have Googled and apparently there is a lemon mint - would such a thing grow all by itself and is it worth keeping? :cnfs:

 

There is also Lemon Verbena (Aloysia citrodona) which is a lovely little shrub to grow and you can dry the leaves and make lemon tea as I do. It must be protected against heavy frost though.

 

I've just dug a huge Lemon Balm out. It's a lovely plant, but it needs room to expand and it can get a bit woody after a year or two.

 

It is a bit of beast but as Aaron says it needs room. If you cut it right down to about 2 or 3 cm each Spring it will be soft and not woody an still grow quite tall-about 3 ft.

 

And spread at least three foot! I need to find somewhere for another, preferably near a path so I can smell it constantly.

Oh I know, front garden!