Alchemilla mollis (Lady's mantle): Bright green soft leaves and a froth of acid yellow/green flowers in summer. Very easy for ground cover

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 'Herbstsonne': Very tall form adding impact to borders. Dark stems with vibrant yellow flowers with a green central cone. Hardy. Up to 2m. [Collect Only]

Rudbeckia subtomentosa 'Little Henry' (PBR): Yellow quilled flowers with chocolate brown centres in late summer. Compact variety with a delightful vanilla scent. Hardy. Up to 90cm. [Collect Only]