Comfrey has been my new favorite herb for the last couple years. Initially I found the leaves would make a rich, low-cost fertilizer simply being left in a pail of water for several days. It got even better when I found out the huge leaves can be picked off and just laid around the base of plants (especially onions), and while decomposing, give off all sorts of rich nutrients.
Then I made comfrey salve, since the roots and leaves contain allantoin, a natural chemical that encourages cell reproduction and makes for some fast healing wounds.
I even discovered that at one time it was believed that a comfrey bath would repair the hymen, thereby creating born-again virgins. This has to be a useless endeavor if there ever was one.
NOW....I find comfrey has it's own magickal attributes as well.
Historically comfrey leaves were burned to help with concentration and divination, as well as to help the practitioner let go of unhealthy relationships or as an additional boost to love spells (very versatile characteristics there: letting go and bringing forth all at the same time).
Comfrey was (and is still) used in protective spells for travelers, and for guarding against theft.
And finally (of interest to a particular friend of mine who frequents casinos), there is an obscure mention of wrapping money in comfrey leaves for several days before gambling, as it will keep the money flowing in, versus out.
I'll settle for decent fertilizer and compost, but it's nice to know I have options.