Ceratostigma plumbaginoides (Plumbago, Hardy plumbago, dwarf plumbago): Brilliant blue flowers in later summer over foliage which turns redder as winter approaches. Stunning ground cover plant for sheltered spots. Not fully hardy in colder parts of UK. To 20cm. Frost-hardy

Gaura lindheimeri Rosyjane = 'Harrosy' (PBR) (Gaura 'Rosyjane'): Airy sprays of pink flowers with a white petal centre. Perennial, but dislikes winter wet and doesn't thrive outdoors in cold areas. To 80cm. [Collect Only]

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.

Salvia guaranitica 'Black and Blue' (Anise-scented sage 'Black and Blue'): A subshrubby perennial with mid-green leaves. Spikes of rich blue and purple-blue flowers from late summer to late autumn.

Salvia patens 'Cambridge Blue': Beautiful Salvia with pale blue two-lipped flowers flowering in late summer. Needs a sunny, sheltered position and protect with mulch.To 1m.

Salvia x jamensis 'Nachtvlinder' (Sage 'Nachtvlinder'): Regal purple flowers on upright stems throughout late summer into autumn.