Seed storage of V. americana has been previously studied, but debate on the subject has not been concluded.
Muenscher (1936) found that mature seeds could not be desiccated in storage without damaging the embryo, but seeds remained viable when intact capsules were stored at 4 °C for up to 3 years ( Ferasol et al., 1995, Campbell, 2005 and Moore and Jarvis, 2007).
In a related species, V. australis S.W.L Jacobs & D.H. Les, from central Victoria, Australia, drying seeds up to 8 months more than doubled the final germination percentage but also delayed germination compared to wet-stored seeds ( Salter et al., 2010).