We have found 42 plants that meet your criteria.

African lily
Agapanthus africanus African lily Wonderful globes of blue flowers from midsummer £8.99 Buy
African lily
Agapanthus africanus 'Albus' African lily White globes of trumpet-shaped flowers £7.99 Buy
African lily
Agapanthus 'Bridal Bouquet' African lily An early-flowering evergreen form £6.99 Buy
African lily
Agapanthus Queen Mum ('Pmn06') African lily Big bi-coloured flowers £12.99 Buy
African lily
Agapanthus 'Taw Valley' African lily A spectacular summer-flowering perennial £6.99 Buy
greater sea kale
Crambe cordifolia greater sea kale Huge dark green leaves and fluffy white flowers £7.99 Buy
sea kale
Crambe maritima sea kale A profusion of delicate, white summer flowers £7.99 Buy
montbretia
Crocosmia × crocosmiiflora 'Emily Mckenzie' montbretia Fabulous orange blooms £7.99 Buy
fleabane
Erigeron 'Sommerneuschnee' fleabane Pink-flushed, white daisies with fine petals £7.49 Buy
sea holly
Eryngium agavifolium sea holly Striking foliage £7.99 Buy
pyreneal cranesbill
Geranium pyrenaicum 'Bill Wallis' pyreneal cranesbill Flowers appear over an extremely long period £8.99 Buy
daylily
Hemerocallis 'Corky' daylily Glorious bright yellow starry flowers £7.49 Buy
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tall bearded iris
Iris 'Best Bet' tall bearded iris Tall and elegant £9.99 Buy
Chilean evening primrose
Oenothera stricta 'Sulphurea' Chilean evening primrose Large, very pale yellow flowers £7.99 Buy
oriental poppy
Papaver orientale 'Harlem' (New York Series) oriental poppy A magnificent bloomer £9.99 Buy
Russian sage
Perovskia 'Blue Spire' Russian sage Violet-blue flowers and silvery foliage. Great planted en masse £9.99 Buy
cinquefoil
Potentilla atrosanguinea cinquefoil Vibrant dark-red flowers in late summer £4.99 Buy
stonecrop
Sedum telephium (Atropurpureum Group) 'Purple Emperor' stonecrop Fabulous variety with deep bronze-purple foliage. £7.49 Buy
lamb's ears
Stachys byzantina 'Big Ears' lamb's ears Purple flowers large Grey-green leaves £7.99 Buy
lamb's ears
Stachys byzantina 'Silver Carpet' lamb's ears Grown for its beautiful silver foliage £6.99 Buy