Once established, rose campion flowers (Lychnis coronaria
) multiply and spread beyond their original bounds. Even when they act more like annuals
than perennials, they will re-seed readily. Rose campion flowers can be grown in planting zones
4-8. They reach a height of 2'-3'. More accurately a "rose magenta" color, the deep pink rose campion flowers bloom on a fuzzy, silvery stalk that is appealing in its own right.