Himalayan blue poppy 'Crewdson Hybrid'

'Crewdson Hybrid' is a bushy, often short-lived, perennial to 1.5m tall, forming basal rosettes of oblong to lanceolate leaves with shallow teeth. The rich, clear blue, slightly-nodding, cup-shaped flowers, borne in summer, comprise wavy-edged elliptical petals, longer than they are broad, and are followed by decorative capsules covered in bristles but containing no viable seed