The daylily Black Ambrosia was hybridized by Salter in 1991. Black Ambrosia was hybridized by crossing (sdlg × Quest for Excalibur). The color of Black Ambrosia can be described as black purple self with green throat. It is a Tetraploid. It blooms in (Midseason,Rebloom). It's flowers measure (5 in, (13 cm)). It has a normal scape height of (28 in, (71 cm)).