Liatris spicata 'Alba':
Spikes of white flowers in mid to late summer. Very useful vertical accent. Bees adore it. To 80cm. Hardy
Salvia 'Hot Lips' (Sage 'Hot Lips'):
Bicolour flowers in white and lipstick red and delicious scented foliage. Half-hardy, copes with -5C in a sheltered spot. To 1m.