Transplants in a field study had 96% survival after 7 years; waterleaf self-sows extensively (Mottl et al. 2006), leading to rapid spread once introduced (Mabry, personal observation).
Mature plants transplanted in the field had 85-100% survival after two years (Golay et al. 2013, Altrichere et a. 2020), continued high survivial in year 3 (Altricher et al. 2020), with recruitment of new individuals observed in year 2 (Golay et al. 2013).
Moderate seed output; high vegetative spread (Barkely 1986, Gleason and Cronquist 1991).