If your catmint is bare in the middle, it may be time to divide the plant. The other option is to prune it back to within an inch of the main stem to encourage new growth.
As most evergreen shrubs, it is better to prune them in early spring just before new growth begins.
You can buy a catmint plant in the spring. You can get it from a nursery most of the summer as well. They attract hummingbirds.
nepeta
You can prune it but the symmetrical shape that makes it attractive will be wrecked. If you do prune only tip prune.
Just walkers.
Prune is just another word for 'cutting' i.e you cut your hair but prune a plant. So prune is to cut shorter.
Diamond Walkers was created in 1965.
the porpose of the walkers crisps business
The Shadow Walkers was created in 1995.
Walkers Shortbread was created in 1898.
A plum or a prune