One colour can become so striking when offset against silver foliage. If the plant produces a flower, that’s a bonus. But purely for their leaves, these plants are effective.
Perovskia atriplicifolia – (Russian sage) ‘Blue spire’. This plant is ideal in a sunny position in well drained soil. It is highly scented too. It will flower through summer into early autumn.
Lavendula – Lavender offers attractive foliage, flowers and scent. French and English both look different in characteristics. French Lavender is inclined to a lime based soil that has plenty of air circulating around. It doesn’t bode well in compact, clay based medium. English Lavender similarly likes a free draining, light soil and neither keen on sitting in moisture.
Cineraria (senecio) a compact sub shrub. Adds a neutral tone to contrast with stronger colours. A bedding accompaniment more than anything. These can propagated by seed / bought in plugs. These are only really for one year bought in bloom and then discarded as opposed to a perennial.
Stachys byzantina (Lambs Ears) ‘Silver Carpet’ – this plant offers texture and colour to an herbaceous border. It prefers dry conditions and will not tolerate being over watered. It is a hardy evergreen, can cope in exposed conditions. It’s a foliage plant so there are no flowers.
Caryopteris (Blue beard) – a mid to late summer perennial shrub. There are various kinds but there is a silver green ‘Blue mist’. Its performance largely depends on how much light it gets, so a full sun position is recommended.
Helichrysum italicum (Curry plant) – as you would expect a highly scented shrub. It prefers to be in a sheltered position but generally resilient to most conditions. It doesn’t like being wet, so well drained soil is advisable.
Juniperus horizontalis ‘squamata’ or ‘Blue Chip’. An effective source of ground cover. The plant needs little maintenance although the aspect should be in full sun. The soil can be sandy, but not poor. It does prefer a degree of fertility. A very hardy, resilient shrub.