Campsis radicans 'Flamenco produces many panicles of six to twelve large orange red flowers on large-growing vines.

Campsis radicans 'Flava' produces many clusters of rich yellow trumpet shaped flowers in mid to late summer.

Campsis radicans 'Madame Galen' produces many clusters of fiery trumpet shaped flowers in mid to late summer.

Campsis 'Indian Summer' displays large trumpet shaped flowers that are orange red with a yellow orange exterior.

Canna 'Cleopatra' is a canna lily with an unusual colour combination of green to brown leaves and yellow to red flowers.

Canna 'Picasso' is a canna lily with unusual yellow flowers heavily spotted in red against green leaves.

Canna 'Tropicanna Black' is a stately canna lily with big, dark bronze leaves and red flowers.

Canna 'Vanillal Cream' is a compact canna lily with creamy white and yellow flowers and large green leaves.

Cardamine angustata (syn. Dentaria heterophylla) a good hellebore companion w/ clusters of small white to pink flowers in early to mid spring.

Cardamine concatenata (syn. Dentaria laciniata) is a mustard relative with clusters of small, white to pink, four-petaled flowers in early spring.

Cardamine diphylla is a cute wintergreen groundcover with clusters of small, white, four-petaled flowers in spring popular with bees and butterflies.

Caryopteris incana 'Beyond Pink'd' is a deciduous shrub known as bluebeard with masses of pink flowers full of nectar.

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

Caryopteris Grand Blue produces masses or rich blue flowers which delight humans and bees and butterflies alike.

Masses or rich blue flowers atop dramatic silver foliage.

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 montana, the perennial bachelor's button, is a cottage garden classic with feathery, royal blue flowers with dark pink centres.

The ornamental buds of Centaurea montana ‘Amethyst in Snow’ burst into flower with silky, pure white petals that radiate in a starburst from deep royal purple centres.

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

Centranthus ruber or red valerian has long-lasting magenta-pink to reddish pink flowers over bluish foliage.

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.

A beautiful white turtlehead for late summer. Chelone glabra has strong upright stems and grows in a range of light conditions.