|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 'Orion'|
Deep violet-blue flowers in early summer. Summer dormant. Good for naturalising.
|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 trachelium 'Bernice'|
Double, deep violet-blue flowers. Upright habit.
|Canna 'Tropicanna Black'|
Large, nearly black leaves. Scarlet flowers. Protest from frost.
Strong-growing with large, deep bronze-purple leaves and very large, vivid orange flowers.
|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.
|Carex trifida ''Rekohu Sunrise''|
Rosettes of creamy, yellow-edged, blue-green foliage. Long catkins on arching stems. Evergreen. Dislikes wet conditions.
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.
Attractive deeply-cut foliage looks good all year. Sprays of tiny white flowers.
|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.
Known as 'Turtle Head' due to shape of pink flowers.
|Chelone obliqua var alba|
Upright stems of large, white, hooded flowers.
Attractive to bees and butterflies.
|Chionodoxa forbesii 'Pink Giant'|
Pink, 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.
|Chrysanthemum 'Chelsea Physic Garden'|
Upright, double, dusky orange-red flowers with bronze reverse.
|Cichorium intybus 'Roseum'|
Rose-pink flowers on tall stems in late summer.
|Cichorium intybus 'Roseum'|
Chicory. Tall stems with long branched spikes of rose-pink flowers over a long period. Middle or back of border.
|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.
Pale pink flowers. Hardy, dwarf plant from North America.
|Convallaria majalis var rosea|
Pink lily-of-the-valley. Scented flowers. Easy.
Medium shrub. Yellow pea flowers.
|Corydalis 'Tory MP'|
Bright blue flowers over ferny foliage. Easy and vigorous.
|Corydalis solida 'Beth Evans'|
Pink flowers over ferny, blue-grey foliage.
|Crocosmia 'Zeal Tan'|
Large, deep orange-red flowers over dark green leaves - later than most crocosmias.
|Crocosmia 'Norwich Canary'|
Rich, egg-yolk yellow buds opening to a brighter yellow inside. Large flowers.