There are many threads on this topic. Browse through some at the link below.

Here is a link that might be useful: herbal teas

Plants for tea is a popular topic so the Daisy's advice is very good - check out old threads for lots of pearls of wisdom.

As far as advice, drink a cup or two of the tea herb in question if you are not already familiar with it. See if you like the taste and if the herb agrees with you before expending much effort or cash into putting it in your garden.

FataMorgana