Characters use different forms of poison for different reasons throughout Foxglove and the Belladonna series as a whole. In Foxglove in particular, poison is a complex symbol suggesting moral ambiguity, as what can be a cure in one dosage can be fatal in another. Further, the narrative suggests that some uses of poison are ethical, while others are not. The novel is titled after the poisonous plant that set the trajectory of Signa’s life. At Foxglove Manor, Signa’s parents and all the guests of their ball were poisoned, leading her to the custody of various relatives who cared little for her. Signa’s feelings about Foxglove Manor upon her return are complex, as she initially does not feel she belongs there but eventually forms a home in the peculiar place. To use her powers as a reaper, Signa must eat berries from the poisonous belladonna flower, which begins to make her ill in Foxglove, unlike in the previous novel. Yet Signa tries to use these powers for good rather than evil, Percy’s use of belladonna to poison his family. Other poisons appear throughout the novel, such as the cyanide in Julius’s champagne glass that sets the plot in motion. Cyanide was a well-known poison during the Victorian Era, leading Eliza to learn about its effects as both a lethal and non-lethal poison. Again, dosage makes a difference in the use of the poison: where Eliza intends to make Sir Bennet ill with a small amount of poison, the larger amount of cyanide added by Byron kills Julius. Herbs like mugwort and tansy were used for centuries as both medicines and poisons. A small dose would help ease the pains of Eliza’s pregnancy, but the larger dose her lady’s maid gave her could end her pregnancy. The use of poisons throughout the novel has various meanings and intentions, showing how there is a gray area to their use, suggesting a moral ambiguity.