Cephalaria gigantea (Giant scabious): Very tall wavy stems topped with large lemon yellow scabious-like flowers. Easy to grow. May need staking or support. Hardy. Up to 2m.

Rudbeckia laciniata: Very tall form adding impact to borders. Vibrant yellow flowers with a darker central cone. Great late-flowering perennial, looks good with grasses. To 2.5m. [Collect Only]