Campanula glomerata 'Bellefluer Blue'
I have two of these plants and what am I supposed to do after they bloom? Am I to deadhead and if I cut them back, after deadheading, will it encourage them to rebloom? This is their second year, so I'm hoping for miracles next year. They are planted in same flowerbed but separate areas. Should I dig them up and replant together to make a bigger plant?