Supporting information and data associated with a case study which looked at increasing awareness of invasive species through public engagement at the Discovery Zone of the RHS Chelsea Flower Show in 2019. The aim of this case study was to achieve effective public engagement with gardeners on the issue of invasive species. This was achieved through two goals: 1) to communicate invasion science (focusing on ornamentals); and 2) to engage with gardeners to collect data for identifying potential 'future invaders'. This forms supporting information and data for chapter 3 of PhD thesis: 'Ornamental plants: our future invaders? Engaging with gardeners to tackle the issue of invasive species'.