This pulmonaria variety 39trevi fountain39 is considered to be one of the longest flowering blue cultivars as it39s flowering periods stretches from march to may during this time you can expect cobalt45blue flowers perched daintily in clusters on tall stems rising from the carpet of silver spotted foliage with lungwort you have a multi use plant that feeds the bees with nectar produces stunning little flowers and attractive foliage and is happy to do all of this whilst it forms