What's eating my campanula portenschlagiana?

Campanula portenschlagiana (wall bellflower) is most persistently damaged by slugs and snails grazing foliage and flowers. Aphids gather on soft growth, and root weevil grubs can damage the shallow root system of this low-growing alpine. Rabbits readily browse it in garden borders. Being a mat-former, slug damage can rapidly ruin the entire spreading clump.

Holes in leaves and petals; mat-forming growth stripped back; slime trails throughout plant Ferric phosphate pellets scattered around margins; grit top-dressing deters slugs; biological nematode treatment on soil

Soft colonies on stems and buds; honeydew and sticky residue attract ants Insecticidal soap or neem oil; direct water spray to dislodge colonies

Root system eaten; mats turn brown in patches and detach from soil easily Nematode drench (Steinernema kraussei) in late summer; repot and inspect roots if plant collapses