An rhs agm winner pulmonaria 39blue ensign39 has clear blue flowers formed in clusters from march to may unlike many lungwort cultivars the green leaves of pulmonaria 39blue ensign39 don39t have the typical pale spots and are broader and more refined creating low spreading clumps that form useful but attractive ground cover 39blue ensign39 is perfect for bringing spring colour to woodland areas and shady borders where it will act as a magnet for pollinating insects he