Witchipedia

Herbalists are herbalists and energy workers are energy workers. Many witches are herbalists and/or energy workers but not all herbalists are witches, and neither are all energy workers. That being said, what are you doing with herbs and crystals? If you are just mixing up salves and lotions and lip balms like one of hundreds of workers at Burt's Bees, you're not a witch, but you might be an herbalist and that's pretty cool. If you are infusing your personal energy into the salve, you are casting a spell, and thus you're a witch. (Everybody naturally infuses their energy into everything they make, the difference is intention.)

But then, how are you defining a spell? A spell is intentionally directing energy toward a goal. Are you sure you're not doing that?

That being said there are quite a few people out there who say that anybody who self-identifies as a witch is legitimately a witch. To that I say hooey. Witchcraft is a craft, that includes a skillset that you have to learn and practice. There is no shame in just being an herbalist.

Someone can plant and garden, but that doesn't make them a witch. Someone can like geology, but that doesn't make them a witch. Witches are people who manifest and change things with metaphysics. This may mean casting spells, building souls, communicating with animals (because they're sending out their energy with their messages to be received by the animal), summoning spirits, etc. Psychics gather information through metaphysics like clairvoyance, precognition, mind-reading, etc. While these people don't necessarily fit the definition of "witch," they may choose to identify as such in a way of taking pride in themselves, as many people use "witch" as an insult towards psychics, and that may be their way in showing pride of who they are and owning up to the word "witch," as they are working in metaphysics just as the witches most people think of (just differently), so that's when the term becomes more general. However, for the MOST part, it means someone who manifests and creates change through interaction with the metaphysical (though most psychics end up doing this anyways in one way or the other).

"Magick" is also a little vague, as it refers to both DIVINATION and MANIFESTATION, which are the two main categories of what might be considered magick, aka, what people might consider witchcraft, including things like tarot and crystal scrying with things like storm-casting and spirit summoning. And if someone considers these two aspects to not only be MAGICK, but to be the main aspects of WITCHCRAFT, as well, then psychics would be able to identify as a witch.

What this means is if the herb and crystal work you are referring to are used to gain psychic information, then, yes, you could be a witch (though others may disagree). Now, if this is not the case, is this someone we're talking about working with the metaphysical? Are they creating change through pure will or from their thoughts/wishes/intent? What do you consider a spell?

If this person is using herbs or crystals to perform what would be considered "magic" to the common person, then, yes, that person could be considered a witch. If they are performing magick, then they can be a witch.