'agastache' originates from Greek, specifically the word 'agastakhēs,' where 'agan' meant 'very much' and 'stakhus' meant 'ear of grain.'

'agastakhēs' transformed into the Latin word 'agastache,' and eventually became the modern English word 'agastache.'

Initially, it referred to the plant's appearance resembling an ear of grain, but over time it evolved into its current meaning of a genus of aromatic plants.