Euphorbia characias subsp. wulfenii (Mediterranean spurge):
Evergreen perennial with blue-green leaves and vibrant lime-green flowers in early summer. Prefers full sun. Hardy to about -10C, but not for long periods. Up to 1.2m.
[Collect Only]
Penstemon 'White Bedder':
Pure white tubular flowers over semi-evergreen foliage. Frost-hardy perennial. Up to 60cm.
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.