The majority of herbs are serviceable as spices for meals. In addition many have some type of medicinal power. Some have other magical properties. Here is a summary of most of what I know at this time.
Chamomile is soothing.
St John's Wort helps get rid of emotional depression/soothes nerves
marijuana - is soothing to many but has intense effects on many: many cannot remain clear headed and use this to soothe their nerves but some actually can.
Mint - is good for banishments and is beneficial to the digestive system; I believe this applies to all the mints, but am not absolutely certain.
star anise: creates good luck
agrimony: good for removing curses, jinxes, bad vibes from others
ginger: good for cleaning the digestive tract, and good for love
There are many herbs which strengthen the immune system. In Germany, there are herbal infusions in ways that I never noticed in the USA. The tea is not so often tea but an herbal infusion of some other kind. I heard a rumor that someone prevented himself from coming down with the black death when it was in Europe by drinking the right tea - something that killed off and banished whatever that was and boosted his immune system.
There is more, but not much. Most of the rest of what I have right now, I put into a section on love, because i learned it for a writing contract this past week.