Salvia yangii (Perovskia atriplicifolia), commonly called Russian sage. This cultivar is the Perovskia atriplicifolia “Blue Spire” and produces blue flowers from early summer to late autumn. Stock Photo | Adobe Stock
Perovskia atriplicifolia 'Blue Spire' - buy plants at Coolplants
Perovskia atriplicifolia (Russian Sage) - BBC Gardeners World Magazine
Perovskia atriplicifolia 'Blue Jean Baby' (Russian Sage)
Perovskia Atriplicifolia 'blue Spire' by Mike Comb/science Photo Library
Perovskia atriplicifolia 'Little Spire'
Blue Spire Russian Sage - 1 Gallon - Herb - Perovskia - Russian Sage | ToGoGarden