Cornus kousa var. chinensis, the Chinese dogwood, has creamy white spring flowers and spectacular fall foliage.

Cornus sericea (syn. stolonifera) is a beautiful native shrub known as red osier dogwood most famous for its red winter stems.

Cornus wilsoniana or ghost dogwood has clusters of small white flowers that bloom in spring and beautiful mottled bark.

Cornus 'Eddie's White Wonder' is a tall, narrowly framed hybrid dogwood with white spring flowers and gorgeous fall colour.

Cornus Rosy Teacups has stunning, rich pink spring blossoms and intense red fall colour.

Cornus Rosy Teacups has stunning, rich pink spring blossoms and intense red fall colour.

'Blue Heron' is a true blue, fragrant Corydalis with finely textured foliage.

Corydalis elata is taller, later blooming, fragrant, and does not go dormant in summer.

Corydalis flexuosa Hillier 'Porcelain Blue' produces clusters of fragrant, glowing blue flowers atop finely textured foliage.

Corydalis flexuosa 'Royal Purple' has red-marked leaves and sky blue and light purple, fragrant flowers.

Corydalis lutea has clusters of bright yellow, spurred flowers that bloom above blue-green foliage for months on end.

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

Corydalis solida 'Beth Evans' is an exquisite spring ephemeral with masses of pink tubular flowers. Choice.

Corydalis solida 'Firebird' is the best red Corydalis, producing sweetly fragrant flowers above finely dissected, fern-like foliage.

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.

Corydalis solida 'White Knight' is an exquisite spring ephemeral with masses of pure white tubular flowers.

Corydalis Blue Line 'Couriblue' produces clusters of glowing blue, honey-scented flowers on cinnamon stems atop finely textured, blue-green leaves.

Cosmos atrosanguineus has flowers that smell like dark chocolate! Resistance is futile. 'Choca Mocha' cosmos is more compact with a stronger fragrance.

Cosmos peucedanifolius 'Flamingo' is a hardy cosmos with large, 3 inch wide, pink, flowers produced in great profusion through summer atop beautifully dissected foliage.

Big, bold and beautiful, Crambe cordifolia is all about presence and drama with huge 6 foot high and four foot wide clouds of white flowers.

Crambe maritima has dramatic, ruffled, silver blue leaves that you can sautee and eat! Or just enjoy their beauty in the garden.

Crocosmia 'George Davidson' has bright orangey-yellow flowers in summer. A magnet for hummingbirds.

Crocosmia masoniorum is a giant montbretia with blazing-orange flowers. A magnet for hummingbirds and butterflies.