Pulmonaria 39blue ensign39 is a striking lungwort with clear blue flowers that appear in large clusters from march to may blue ensign has unusually broad foliage unspotted and more refined creating low spreading clumps that form an attractive ground cover awarded an rhs agm this superb variety attracts pollinating insects with its nectar rich blooms and is ideal for bringing spring colour to woodland areas and shaded borders height 35cm 40143441 spread 45cm 401834