Herbs are used in many religions, such as in Christianity (myrrh (Commiphora myrrha), ague root (Aletris farinosa) and frankincense (Boswellia spp)) and in the partially Christianized Anglo-Saxon pagan Nine Herbs. In Hinduism, a form of basil called tulsi has been revered as a goddess for its medicinal value since Vedic times. Many Hindus have a Tulsi plant in front of their homes.
Herbs were also considered sacred in European pagan beliefs.
The best known example is mistletoe. The European mistletoe, Viscum album, featured prominently in Greek mythology and is believed to be the golden bough of Aeneas, an ancestor of the Romans.
The Norse god Baldr was killed with mistletoe.
Mistletoe bears fruit at the time of the winter solstice, the birth of the new year, and may have been used in solstice rituals in Druidic Britain as a symbol of immortality. In Celtic mythology and Druidic rituals it was considered a remedy for infertility in animals and an antidote to poison, although the fruits of many viscous are actually poisonous when ingested, as they contain viscotoxins.
Verbena or Verbena has long been associated with divine forces and other supernatural forces. It was called “tears of Isis” in ancient Egypt, and later “tears of Juno”. In ancient Greece it was dedicated to Eos Erigineia. In the early Christian era, popular legend has it that verbena (V. officinalis) was used to heal the wounds of Jesus after his removal from the cross. Consequently, it was called “Sacred Herb” or (for example, in Wales) “The Devil’s Bane”. The generic name is the ancient Roman term for sacrificial herbs considered to be very potent. Pliny the Elder describes the feast presented on the altars of Jupiter; It’s not entirely clear if this refers to a verbena rather than the general term for premium sacrificial herbs.
Hazlitt’s Faiths and Folklore (1905) cites Aubrey’s Miscellany (1721), namely:
“Verbena and Dill / Obstructing the witches of their will”.  
In the young adult novel series The Vampire Diaries, author L. J. Smith uses vervain to protect humans from vampires,  in an extension of vervain’s legendary magic-suppressing powers against witches. In The Struggle, Volume II, the vampire Stefan tells the human Elena that vervain can “protect you from the spell and can keep you sane if someone is using powers against you.”  He tells her how it’s prepared and used: “Once you’ve extracted the oil from the seeds, you can rub it into your skin or add it to a bath. And you can make the dried leaves in a bag and take it with you, or put it under the pillow at night, “but gives her an unsuspecting twig to protect herself in the meantime. 
Verbena flowers are engraved on cimaruta, Italian anti-witchcraft pendants. In 1870 The history and practice of magic of “Paul Christian” (Jean-Baptiste Pitois) is used in the preparation of a mandrake amulet:
Would you like to make a mandrake, as powerful as the homunculus (little man in a bottle) so praised by Paracelsus? He then finds a root of the plant called bryony. Remove it from the ground on a Monday (the day of the moon), shortly after the spring equinox. He cuts off the ends of the root and bury it at night in a rural cemetery on the grave of a dead person. For thirty days it is watered with cow’s milk in which three bats drowned. When the thirty-first day arrives, extract the root in the middle of the night and dry it in an oven heated with branches of verbena; then wrap it in a piece of a dead man’s sheet and take it with you everywhere. 
Other examples of sacred herbs include valerian, yarrow, hemp, and mugwort.