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.
Lobelia x speciosa 'Vedrariensis':
Dramatic spikes of royal purple flowers in late summer. Needs damp soil in summer so is ideal for bog gardens. Height to 1.2m. Hardy