Agastache 'Liquorice Blue' also known as Korean mint. Bushy, upright herbaceous perennial to 1.2m tall, with aromatic, dark green, oval to lance-shaped leaves and long whorled spikes of tubular two-lipped purple-blue flowers which are very attractive to pollinators through summer to autumn. 
Supplied as 6 plug plants to be potted on before planting in the garden.