This grower is sure of this plant identification.
Hardy; Ht 90cm; Sun/semi-shade; Moist soil; Flowers summer-autumn
Lobelia ‘Butterfly Blue’ (Perennial Lobelia). This perennial lobelia has spires of bright violet-blue flowers with white markings and mid green, lanceolate leaves.
Cut back old growth in autumn or early spring.
Grown for their attractive flower, which attract bees.
Italics = data drawn from parent genus or speciesView Full Plant Finder Record