From the summer of 1957 and throughout the Mao era, “poisonous weed” was a label to be avoided at all costs. Having fallen for the flowers in early 1957, Xu Chengmiao would find himself labeled a “poisonous weed” by the end of the year. As with the Hundred Flowers, the advent of this pernicious botanical label has its own history. This chapter explores how “poisonous weeds” entered the Chinese garden, the role of the Soviet Union in the Chinese Arcadian turn, and how lionized writers such as Guo Moruo gave an endogenous spin to writing that celebrated an idyllic rural life. This then deepened the creative engagement with the Hundred Flowers as it traveled back to the Soviets and into internal circulars. It also studies how the circulation of the Hundred Flowers helped Mao navigate the fallout from Khrushchev’s “secret speech,” and what happened after the chairman stepped into the garden with his own take on the flowers.