Perennials

Salvia ‘Crystal Blue’

Pastel blue sage forms a compact mound of summer blossom to 50cm (20in). From: www.hardys-plants.co.uk, tel: 01256 896533.

Heuchera ‘Sweet Caroline’

Neat, evergreen, lemon and lime foliage with pink flowers. From: www.plantagogo.com, tel: 01270 820335.820335

Corydalis ‘Porcelain Blue’

Spring and autumnflowering perennial. Moist, well-drained soil. From: www. hillier.co.uk, tel: 01794 368733.

Iris ‘Rachel de Thame’

Distinctive colour combination named after the TV presenter. From: www.iriscayeux.com, t tel:l: f freephoneh e 0800 096 4811 4811.