Caladium 'White Wonder' is sun tolerant with beautiful arrow-shaped leaves of icy white with bright pink veining and thin, dark green lines.

Calamintha grandiflora 'Variegata' is a variegated calamint that forms fragrant, upright, bushy mounds with rose-pink flowers.

Calamintha nepeta 'Marvelette Blue', the lesser calamint, has aromatic foliage and clouds of light purple and blue flowers.

Calendula 'Lady Godiva Orange' is an English marigold with double, golden orange flowers and aromatic foliage.

Callisia (syn. Tradescantia) navicularis, or chain plant, is a semi-succulent, trailing vine with small olive green and purple leaves.

Caltha palustris 'Plena' is a cold-hardy, moisture-loving, Marsh marigold with green leaves and double, button-shaped, yellow flowers.

Camellia japonica 'Anacostia' features lovely semi-double petals in luscious pink around the golden stamens. Hardy to zone 6.

Camellia japonica 'April Dawn' has been bred for winter hardiness, being one of the best selections for areas in zone 6. Hardy to zone 6.

Camellia 'April Kiss' offers stunning mid pink to reddish pink, formal, double flowers. Extra hardy to zone 6!

Camellia japonica 'April Remembered' has lovely semi-double light pink flowers with a white central glow. Hardy to zone 6.

Camellia japonica 'Chandleri Elegans' produces stunning candy pink flowers with pink anemone centres sometimes with bits of white.

Camellia japonica 'Eleanor McCown' produces unusual white flowers with variable dark pink flecks and stripes.

Camellia japonica 'Jacks' features incredible double rose-pink flowers in spring.

Camellia japonica 'Jordan's Pride' (aka 'Herme') features incredible bicolour white flowers with rosy pink mottles, stripes and flares.

Camellia japonica 'Magnoliaeflora' (syn. 'Hagoromo') is an heirloom Japanese cultivar from the late 1800s.

Camellia japonica 'Nuccio's Jewel' features incredible semi-double white flowers that mature to a showy pink.

Camellia japonica 'Pearl Maxwell' has beautiful, formal, soft shell pink flowers from mid to late season.

Camellia japonica 'Silver Waves' is a lovely pure white semi-double cultivar with golden anthers.

Camellia japonica 'Silver Waves' is a lovely pure white semi-double cultivar with golden anthers.

Camellia japonica 'Spring's Promise' has lovely single rosy red to deep pink flowers that are 2-3 inches wide. Hardy to zone 6.

Camellia japonica 'Swan Lake' has beautiful, double flowers in shades of pure white and cream from mid to late season.

Camellia japonica 'Vestito Rosso' has stunning, formal, crimson red flowers that bloom over a long period.

Camellia japonica 'Vestito Rosso' has stunning, formal, crimson red flowers that bloom over a long period.

Camellia sasanqua 'Apple Blossom' offers beautiful, small, white flowers with pink tips in great profusion from fall through winter.

Camellia sasanqua 'Chansonette's Blush' offers beautiful light to mid pink flowers in profusion on wide-spreading plants.