|Calamintha nepeta 'White Cloud'|
Spikes of small white flowers over mounds of mint-scented foliage.
|Caltha palustris var alba|
White form of marsh marigold. Single flowers with yellow centres over mound of round leaves.
|Camassia quamash (syn esculenta)|
Rich, dark purple-blue flowers with bright yellow stamens. Borders or in rough grass.
|Campanula persicifolia 'Blue Bloomers'|
Large, double blue flowers on upright stems.
|Campanula persicifolia 'Cornish Mist'|
Lovely, pale grey-blue, bell-shaped flowers.
|Campanula trachelium 'Bernice'|
Double, deep violet-blue flowers. Upright habit.
|Campanula trachelium 'Purple Break'|
Long heads of purple-violet bells.
|Campanula trachelium var Alba|
Spires of white bells.
|Canna indica 'Tropicanna Gold'|
Wide leaves striped with bands of green and gold. Brilliant yellow-orange flowers in summer. Protect from frost.
Pretty, bright pink flowers.
Known as Cupid's Dart. Branched sprays of large, dark-centred, lavender-blue daisies over grassy leaves. Flowers can be dried.
Member of ginger family. Orange-yellow spikes with red bracts.
|Centaurea montana 'Grandiflora'|
Deep violet-blue cornflowers with purple centres. Deadhead for second flush of flowers.
Giant scabious. Large, pale yellow flowers.
Low-growing herbaceous perennial with spreading roots. Clusters of rich blue flowers. Leaves turn red or purple in autumn.
|Cerinthe major var. purpurascens|
Tubular yellow and purple flowers with purple bracts. Attractive blue-green leaves. Annual.
|Chelone oblique syn alba|
Upright stems of large, white, hooded flowers.
|Chiastophyllum oppositifolium 'Jim's Pride'|
Cream-edged evergreen foliage. Arching chains of yellow flowers. Mat-forming.
|Chionodoxa forbesii 'Blue Giant'|
Bright blue, starry flowers with large white centre.
|Chrysanthemum 'Clara Curtis'|
Sprays of single, clear pink flowers.
|Chrysanthemum 'Mary Stoker'|
Sprays of soft apricot-yellow flowers.
|Chrysanthemum 'Nantyderry Sunshine'|
Sprays of small, bright yellow, semi pom-pom flowers. Easy.
Late-flowering hardy chrysanthemum. Mid pink, double pompons. Upright form.
|Chrysanthemum 'Chelsea Physic Garden'|
Upright, double, dusky orange-red flowers with bronze reverse.
White-tinged green flowers - a bit like shaving brushes! Increases by sending out runners.
|Cirsium 'Trevor's Blue Wonder'|
Not really blue but with deep purple thistle-like flowers on tall stems over rosettes of leaves.
|Cirsium rivulare 'Atropurpureum'|
Large, deep pink thistle heads Sun or part shade. Prefers some moisture.
|Claytonia sibirica f albiflora|
Pretty ground cover. New leaves are bronzed and glossy. White flowers.
|Convallaria majalis var rosea|
Pink lily-of-the-valley. Scented flowers. Easy.
|Coreopsis grandiflora 'Heliot'|
Single, deep yellow flowers with ragged edges and red markings at base of petals.
|Coreopsis verticillata 'Grandiflora'|
Long-lasting yellow daisy-like flowers over neat bushes of fine wiry leaves.
|Corydalis 'Tory MP'|
Bright blue flowers over ferny foliage. Easy and vigorous.
|Corydalis 'Sylvia's Castle Haven'|
Navy blue flowers over ferny foliage.
|Corydalis solida 'Beth Evans'|
Pink flowers over ferny, blue-grey foliage.
|Corydalis solida 'George Baker'|
Tuberous, herbaceous perennial. Deep brick-red flowers over grey-green foliage.
|Corydalis temulifolia 'Chocolate Stars'|
Bronze foliage with speckled white edges emerges in winter. Pale lavender flowers.
|Crocosmia 'Emily MacKenzie'|
Large, dusky orange flowers with dark red centres.
|Crocosmia 'Norwich Canary'|
Rich, egg-yolk yellow buds opening to a brighter yellow inside. Large flowers.