Astilbe chinensis var. taquetii 'Purpurlanze':
A very tall form with statuesque fluffy purple flowers above fresh green ferny foliage. Excellent for damp or shady spots. Hardy. Up to 1.2m.
Digitalis grandiflora (Yellow foxglove):
Perennial foxglove with yellow bell-shaped flowers above clumps of evergreen lance-shaped leaves. Bee-friendly. Hardy. Up to 1m.