We love lemon balm in tea, in water, in salad dressings and in cooking.
I don’t really do anything with the Blue Hyssop, mostly just like it for the blue flowers (it is very similar to lavender but blue rather than purple).
The catnip is so easy to grow. I don’t really do anything with this one either, except give bundles of it to people with cats!
Feverfew has lots of pretty daisy-like flowers. I don’t really do anything with this herb either besides enjoy the flowers. There are tons of cilantro volunteers throughout the garden. It seems people either love or hate cilantro: we love it! We will be growing lots of other herbs from seed, this is just what is in the garden now. The catnip and cilantro don’t really qualify as “perennials” but they self-sow very easily.