However, harebells have much shorter stems, smaller flowers and different leaf size and shape. Creeping bellflower (Campanula rapunculoides) A3924-05 Brendon Panke, Ryan deRegnier, and Mark Renz I nvasive plants can thrive and aggressively spread beyond their natural range, disrupting ecosystems. It also spreads very easily as each stem produces up to 15,000 seeds. Distinguishing Features. Posted by growitall (Calgary, Alberta, Canada) on Feb 22, 2014 1:09 PM. A completely empty, full sun yard with a Southern exposure. The City of Edmonton is asking to help stop the spread of invasive weeds in Edmonton. Once established, creeping bellflower is very difficult to remove as even the smallest tiny root fragments can grow entirely new plants. Carpathian harebell. Native of Eurasia but nowadays widespread in North America. Avoid introducing this plant to your yard through wildflower seed mixes and potted plants (ensure purchased, Dispose of all removed plant parts by bagging and sending to the. Upon seeing its spontaneous blooms in your perennial bed for the first time your reaction will probably be, “I didn’t plant that but it’s pretty enough to leave alone.” Creeping bellflower (Campanula rapunculoides), a beautiful, but invasive garden weed. top It can survive periods of drought and tolerates a range of light condi-tions. Creeping Bellflower is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. Bellflower, Creeping <