We have found 15 plants that meet your criteria.

convolvulus
Convolvulus cneorum convolvulus Fabulous silver foliage and white flowers £9.99 Buy
lavender
Lavandula angustifolia 'Imperial Gem' lavender An excellent variety for low hedges £7.99 Buy
lavender
Lavandula 'Sawyers' lavender Compact mounds of silvery foliage £7.99 Buy
French lavender
Lavandula 'Tiara' French lavender Attractive blue flowers with creamy-white flags £4.99 Buy
cotton lavender
Santolina chamaecyparissus cotton lavender Lovely accent foliage colour in a mixed border £7.99 Buy
senecio
Brachyglottis (Dunedin Group) 'Sunshine' senecio Yellow flowers and silver leaves £8.99 Buy
rock rose (syn Wisley Pink )
Helianthemum 'Rhodanthe Carneum' rock rose (syn Wisley Pink... Low growing, sun-lover £7.99 Buy
lavender
Lavandula angustifolia 'Hidcote' lavender A compact lavender, with intense, violet flowers £7.99 Buy
French lavender
Lavandula 'Fathead' French lavender A hardy French lavender £7.99 Buy
French lavender
Lavandula 'Regal Splendour' (PBR) French lavender Incredible dark purple-violet flags £7.99 Buy
oleaster
Elaeagnus 'Quicksilver' oleaster Gorgeous silvery foliage £17.99 coming soon
lavender
Lavandula angustifolia 'Elizabeth' lavender A new variety with violet flowers £7.99 coming soon
lavender
Lavandula angustifolia 'Melissa Lilac' (PBR) lavender Large, lilac flowers in summer £8.99 coming soon
Russian sage
Perovskia atriplicifolia 'Little Spire' (PBR) Russian sage A shorter form of the popular Russian sage £9.99 coming soon
rock rose
Helianthemum 'The Bride' rock rose Tough and drought tolerant once established £7.99 coming soon