(‘Polbress’) An upright, winter dormant herbaceous perennial. Foliage emerges is spring is purple tinged then turning green, but reverting back to spring colouring in autumn. Priduces clusters of sky blue flowers, marked with a darker blue with a small white centre. Flowering period May, June and July. Height 60cm. Spread 30cm. Plant requires full sun to partial shade in good well drained soil.