Phenological growth stages of “pawpaw” [Asimina triloba (L.) Dunal, Annonaceae] according to the BBCH scale

•Asimina triloba is a fruit crop with a tropical flavor adapted to temperate climates.•The phenology of the “pawpaw” is described according to the extended BBCH-scale.•A useful tool for an underutilized fruit crops with a clear niche for expansion.•The results facilitate comparative phenological studies among different growing conditions.