[Happy Monkey]

Yes, when prepared homeopathically, they are useless. Calendula as well. If they are prepared in an herbal or folk concoction, they may be useful (or harmful). That's one thing that is good about homeopathic remedies- they can honestly say there are no harmful side effects, as there are no effects at all.

For example, if you take some calendula and mix it with fat, and smear it on a burn, then you are applying calendula to the burn. If calendula is efficacious, then it will have its effect.

If you take calendula, and mix it into ten units of water, and then repeat that process thirty times, then all you will have left is water, and when you put it on a burn, it will be as useful as water.