Coleus scutellarioides Under the Sea 'Pink Reef' is a tender tropical with lobed pink and burgundy foliage.

Coniogramme emeiensis 'Golden Zebra' is a variegated form of the bamboo fern with lime green horizontal stripes.

Conophytum bilobum is an intriguing living pebble with pale bluish succulent leaves with two lobes that make them look like rabbit ears.

Conophytum maughanii is a living pebble that looks like a soft, fat, jelly-like succulent with a central cleft and shallow lobes.

Conophytum minimum 'Wittebergense' is a darling living pebble forming roundish, succulent heads with bold dark spotting.

Conophytum scitilum is a cute living pebble forming roundish, succulent heads with bold dark lines against a blue-grey background.

Conophytum vanzylii is a living pebble with nearly perfectly round bluish green spheres with a small cleft like red lips.

Cordyline australis Pink Passion 'Seipin' is a dazzling cabbage palm with electric pink and burgundy foliage forming spiky displays of subtropical drama.

Cordyline terminalis 'Cherry Cordial' is a fantastic ti plant with shiny, tropical multicoloured foliage in mahogany, olive green and bright red.

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.

Cornus capitata 'Mountain Moon' is an evergreen dogwood with grey-green foliage and large, white to pale yellow flowers.

Cornus elliptica Empress of China is a gem of an evergreen tree with copious pointed white flowers and purple winter foliage.

Cortaderia 'Blue Bayou' is a dwarf pampas grass with blue foliage and classic white flower plumes on plants of a manageable size.

Corydalis ochroleuca is smothered in fragrant, creamy white, tubular flowers with yellow at the centres for months.

Corydalis 'G.P. Baker' has amazing near-red flowers atop delicate bluish-green foliage in spring.

Corydalis solida 'Purple Bird' has warm purple flowers atop delicate bluish-green foliage in spring.