A white, Brittish psychic by the name of Jemima, is perhaps the world's only "asparamancer". Jemima, a.k.a. "Mystic Veg" uses asparagus to divine the future.
Despite the oddity, Jemima actually uses similar methods that many diviners use, that is by tossing the spears of asparagus in the air and the interpreting the patterns of their fall. At one point she is asked if she can substitute celery stalks and she says no but in reality there should be nothing preventing her from using anything other than celery, save for her own belief that anything else wouldn't work.