Caryopteris x clandonensis ‘Beekeeper’ is a compact bluebeard with blue flowers and golden-green foliage.

Caulokaempferia sikkimensis is an orchid ginger with bright green paddle-shaped leaves tubular white flowers with pink throats.

Ceanothus velutinus is a beautiful white-flowered species related to the California lilacs with aromatic foliage.

Ceanothus 'Lemon Ice' is a hardy, upright, evergreen shrub with variegated green/yellow foliage and fragrant blue blossoms.

Centaurea 'Colchester White' has bold, thistle-like, lavender-pink flowers and large, finely cut, silver-grayish-white foliage.

Centaurea 'Pulchra Majora' is a cool bachelor's button with dramatic artichoke-like buds and silver foliage.

Cercidiphyllum japonicum 'Rotfuchs' is a special katsura with burgundy foliage that turns blue-green by mid summer.

Cercis canadensis 'Covey' Lavender Twist is a special weeping form perfect for small gardens and containers.

Cercis canadensis 'Hearts of Gold' offers dramatic golden foliage that emerges flushed with orange.

Cercis canadensis 'Ruby Falls' has weeping branches with striking burgundy purple foliage.

Ceropegia woodii 'Silver Glory' is an extra silver version of string-of-hearts.

Chelidonium hylomeconoides is an easy-to-grow Asian forest floor species with bright golden yellow flowers that will bloom constantly from spring to fall.

Chionanthus virginicus, known as the fringe tree, is a unique shrub or small tree with unique fragrant white flowers.

Chrysogonum virginiana 'Quinn's Gold' has flowers opening bright yellow and maturing to cream.

'Calamandarin' is a cross of the calamondin or calamansi (xCitrofortunella mitis) and a mandarin orange (Citrus reticulata).

Citrus wilsonii 'Ichang Lemon' is a hardy lemon for the west coast which can withstand at least -12 degrees Celsius.

Citrus amblycarpa 'Nasnaran' is a hardy mandarin for the west coast which can withstand at least -12 degrees Celsius.

Citrus reticulata 'Shiranui' is a large, distinctive, and highly regarded mandarin that sells for more than $7 each in Japan!

Citrus x sinensis 'Shamouti' is a fabled orange from the Middle East also know as the Jaffa sweet orange.

Citrus 'Troyer' is a hybrid of the 'Washington' navel orange and the trifoliate orange that is hardy to at least -15 degrees Celsius.

Citrus 'US 119' is a complex hybrid that is extremely hardy to at least -12 degrees Celsius producing sweet oranges.

Poncirus trifoliata 'Snow Dragon' is a variegated and contorted form of the trifoliate orange 'Monstrosa' or 'Flying Dragon'.

Clematis chrysocoma 'Sericea' very much resembles C. montana in flower and foliage with masses of pure white flowers.

Clematis crispa has small, nodding, lightly fragrant, urn-shaped flowers in shades of pale blue to violet.

Clematis fasciculiflora has wonderful burgundy-infused new growth and silver-centred leaves with fragrant winter flowers.