Contemporary speculative genres such as science fiction, fantasy, and horror have generated an uncountable number of non-realist plants that can provide new ways of re-enchanting – and returning us to – the real plants with which we inhabit the planet. Depictions of fantastical plants do not, however, always reflect an environmentalist agenda, and the long pedigree of monstrous plants demonstrates considerable complexity, for example in encoding monsterised images of both coloniser and colonised in the figure of the aberrant plant, or, in African-American literature, critiquing the plantation system’s violence against human and non-human bodies. In many serialised works, the plant can serve as merely a novel monster of the week among many interchangeable excuses for action and adventure, while other texts deploy the alien plant in order to imagine different modes of consciousness and being, or offer the promise that we might communicate more meaningfully with plants. The unusual plants to be found in much botanical speculative fiction may cultivate ecological and other-species consciousness in unconventional ways, as we see in texts from authors as different as J. R. R. Tolkien in his mid-twentieth-century epic fantasies and Richard Powers in his 2018 climate change novel The Overstory.