I don't have a specific source of info, but I did just start growing thing that I found myself buying on a regular basis.
In addition to the above, Marsh Mallow is easy to grow and I use it as part of a cough syrup every year. also, German Chamomile is easy, yarrow goes great with Elderberries for fighting colds/flu, and calendula for balms.
Don't forget that the herbs that you are using the roots of need to be at least 3 years old to have the benefits.
It is great fun, and rewarding to see that part of our household budget go down!
