FENNEL: purification, protection, healing, money.
FERNS: luck, love, banishing, releasing, exorcism, defense.
FEVERFEW: protection, purification, defense, cleansing.
FLAX: protection, beauty, healing, money, psychic powers.
FOXGLOVE: protection.
FRANKINCENSE: protection, blessing, spirituality, meditation, power, consecration, exorcism.