Herbs and tarot got hand in hand if you ask me; both are revelatory portals and when used together, they can still the mind before readings or fill the body with the spirit of a reading. Many seers will smoke an herbal blend or drink an herbal tea before divining by cards, to give clarity and openness or to protect the body from spiritual harm. Some seers, however, learn the ingredients to an after-reading tea or smoke blend by casting the lots first and discerning the meaning of the reading and how it can be translated herbally. One method is too look into established herbal lore regarding tarotology and blend from that school of thought. If you're more of an intuitive artist in this regard, you could assign your own herbs to particular cards based on like correspondences, e.g, 3 of Swords corresponds to air, intellect and conflict and so I associate it personally with slippery elm which is used to treat social conflict.
The Star, The Lovers, Strength: A Tea for Love's Intentions: a blend of clove, cinnamon, catnip and wormwood give some insight into the difficult choices in a relationship.
The Magician, 5 Cups and The Chariot: A Brew for the Brave: Red clover, anise and horehound invigorates the blood when confronting a disaster in on the horizon.