Hi Jill,
I, too grow as many herbs as possible, and especially love the perennial herbs. I have learned most of what I know from Jack Spirko of “The Survival Podcast”. If you go to his site and do a search for medicinal herbs you will find two podcasts he has done that are very informative. Also, he has gotten a lot of his info from “Sand Mountain Herbs. com” They have so much information on their website. Good luck to you, I think you are going to have so much fun and satisfaction.
Toni