Chamomile is my favourite herb tea as well, but personally i've always wanted to try and grow real tea,
Camellia sinensis. Don't know much about its cultivation tho. In addition there seriously are hundreds of herbs that can be used as tea. To name a few: Hibiscus, rosehip, Red raspberry, Lemon grass, Anise, Echinacea (medicinal), Kava root (psychoactive). Check out the wikipedia entry for herbal tea for a longer list. Happy Gardening!
