Results/Conclusions Across treatments, successful and unsuccessful invasive species differed in plasticity for many of the traits measured; however, neither group showed consistent patterns in trait values. There were significant invasive status-by-environment interactions in both vegetative and reproductive traits. Contrary to expectations, the unsuccessful exotic species exhibited a Jack-of-All-Trades reaction norm, while the successful invasive species exhibited a Master-of-Some pattern. This suggests that there is more variation in fitness in the successful invasive species than unsuccessful ones. My data support the idea that successful invasive species are more plastic than unsuccessful invasive species in seed production, number of tillers, and total biomass.