Pulmonaria 'Blue Ensign'
Pulmonaria longifolia 'Blue Ensign' is a mat-forming perennial with plain green leaves and clusters of intense, gentian-blue flowers in early spring, excellent for shady ground cover.
Sun: Partial Shade to Full Shade.
Soil: Moist, humus-rich.
Hardiness: H5 — down to −15°C.
Flowering: Feb, Mar, Apr, May.