Colchicum 'Violet Queen' is a vigorous plant with bright purple, tesselated flowers with white lines down the throats.

Colchicum 'Waterlily' is one of the most beautiful of the autumn crocus producing multiple double-petaled, lavender-pink flowers per bulb.

Colocasia esculenta is a taro or elephant ear with large, shiny, green tropical foliage.

'Black Coral' is a taro or elephant ear with luscious, shiny, purple-black, tropical foliage for maximum drama.

Colocasia exculenta 'Ele Paio' is a rare taro with shiny, green tropical foliage randomly striped and speckled in white.

Colocasia Thailand Giant is a taro or elephant ear with gigantic foliage. Buy first, worry about where to put it later. ;-)

Colocasia 'Mojito' has incredible black-speckled taro/elephant ear leaves. A magnificent focal point for containers or garden.

Colocasia esculenta 'Waikiki' is a taro or elephant ear with stunning, shiny, variegated foliage with white and pink veins.

Comptonia peregrina, commonly known as sweet fern for its fragrant, lustrous, fern-like foliage, is a super hardy shrub for terrible, infertile soils.

Convallaria majalis 'Bordeaux' is an improved version of the old-fashioned lily-of-the-valley with larger and more plentiful flowers.

Convallaria majalis 'Hardwick Hall' is a lily-of-the-valley with fragrant, white bell-shaped flowers and foliage that is rimmed in yellow.

Convallaria majalis 'Hofheim' is a rare form with gold to light green edged leaves, sometimes with extra stripes.

Convallaria majalis 'Rosea' is a lily-of-the-valley with pale pink, waxy, fragrant, bell-shaped flowers.

Classic, fragrant, white flowers in spring and variegated foliage that looks good through spring, summer and fall.

Cordyline 'Dancing Paso Doble' is a subtropical cabbage palm with dramatic deep purple foliage with hot pink edges.

Cordyline 'Renegade' is a subtropical cabbage palm with glossy, dark purple foliage that appears almost black.

Cordyline 'Salsa' is a dazzling cabbage palm with bright red and deep pink foliage forming spiky displays of subtropical drama.

Coreopsis Big Bang 'Sun Splash' has all summer-long fiery flowers of bright red with golden tips.

Coreopsis Lil Bang 'Starstruck' has big, two-tone petals of magenta and light pink all summer long.

Coreopsis Permathread 'Shades of Rose' is a tickseed with varying shades of pink around yellow centres.

Cornus canadensis, or bunchberry, is an excellent native ground cover for part shade and loose humusy soils.

Cornus kousa Scarlet Fire has large, glowing pink flowers in late summer and burgundy autumn foliage.

Cornus kousa 'Snow Tower' is a compact dogwood with masses of single white flowers and striking fall colour.