Monarda 'Prarienacht' (Bee Balm) Bee Balm 'Prarienacht', Bergamot 'Prarienacht', Monarda 'Prairie Night' An enduring performer, Monarda 'Prarienacht' (Bee Balm) is a clump-forming perennial boasting masses of deep mauve to rosy-purple flowers, borne in dense, globular terminal heads.