Inner city resident with creeping bellflower here. I did some googling last year and found some guy in Edmonton who claimed to have a solution. Messaged him and he mailed me a bottle of his “trial” stuff on the condition that I let him know how it worked. Painted a bunch on the leaves as instructed (it was two products to paint on half the leaves each) and by god it worked brilliantly. No more bellflowers.
No idea what it was and I’m sure it was toxic as #### but PM me and I’ll send you contact deets otherwise you’ll be fighting a never ending battle. Even if you dig the whole patch up it’s likely to come back.
Between the bellflowers and the lilies of the valley (had to take apart a whole rock bed to dig out those tubers) this year I’m winning the war on infectious plants.
