Clematis 'Avant Garde' is a late-blooming Evison clematis with magenta-red petals and a double centre in pink with yellow stamens.

Clematis Evison 'Bijou' is a dwarf cultivar with violet-purple flowers with pink central stripes and pink anthers.

Clematis Evison 'Bourbon' has large, vibrant red flowers with pink stripes and yellow centres.

Clematis Evison 'Cezanne' is from the compact Boulevard series and grows to just 3-4 feet tall with lovely lavender-blue to mauve flowers.

Clematis Evison 'Charmaine' has rich red, single to double flowers with yellow centres.

Clematis Evison 'Clair de Lune' is a tall, repeat bloomer with large 5-8 inch single flowers of lavender and white flowers.

Clematis Evison 'Corinne' has ruffled white flowers with subtle violet pink stripes and pink and white anthers.

Clematis 'Crystal Fountain' has lavender-blue petals with striped olive green centres, and white and yellow stamens.

Clematis Evison 'Diamantina' has gorgeous, large, 4-6 inch wide, double pom-pom-like, purple-blue flowers.

Clematis Evison 'Diana's Delight' has large, 4-6 inch wide, single, lavender flowers with yellow anthers on 6-8 foot vines.

Clematis Evison Boulevard 'Edda' has large semi-double flowers of deep purple with red bars on 3-4 foot long vines.

Clematis Evison 'Fleuri' is a short, repeat bloomer with large 5 inch wide single flowers of violet-purple.

Clematis Evison 'Giselle' is a stunning cultivar with narrow, pointed petals in shades of light to mid pink.

Clematis 'Guiding Promise' has rich grape purple flowers with hints of raspberry at the edges around purple anthers.

Clematis Evison 'Hyde Hall' has large 5-7 inch single flowers of white with a pale green bar.

Clematis Evison 'Ines' is a short, repeat bloomer with large 3-5 inch wide single lavender flowers.

Clematis 'Josephine' has big double pink flowers with with lilac pink petals centred with a magenta midrib.

Clematis Evison 'Kitty' is a powerhouse bloomer said to put on a flower show for up to six months a year!

Clematis Evison 'Lindsay' is a 6-8 foot tall, repeat-blooming vine with large 6-7 inch wide blue-purple flowers.

Clematis Evison 'Olympia' has single to semi-double lavender blue flowers with lemon yellow centres.

Clematis Evison 'Parisienne' has large 6 inch wide, single, mauve flowers with purple anthers on 3-4 foot tall vines.

Clematis Evison 'Picardy' produces large, single flowers of red and purple with deep red bars on vines just 3-4 feet tall.

Clematis Evison 'Poseidon' is a short, repeat bloomer with 4-5 inch wide single flowers of pink and magenta.

Clematis Evison 'Rosemoor' offers rich fuchsia-red flowers with lavender-red central bands.

Clematis Evison 'Sally' is a beautiful, free-flowering pink cultivar with deeper pink central bars.

Clematis Evison 'Samaritan Jo' has pointed petals in silvery pink with purple edging and dark purple and yellow centres.

Clematis Evison 'Sarah Elizabeth' is from the compact Boulevard series with distinctive, glowing almost salmon pink flowers.

Clematis Evison 'Tekla' has large, single flowers of magenta-pink with light pink bars and white and purple anthers.

Clematis Evison 'The Duchess of Cornwall' is a short, repeat bloomer with large single flowers of rich violet-blue.

Clematis 'Vicki' has rich pink flowers with magenta-red central bands for a striking bicolour display.

Clethra alnifolia 'Hummingbird' is a compact shrub with white bottlebrush flowers that are fragrant and nectar-rich.

Clethra alnifolia 'Ruby Spice' is a compact shrub with pink and white bottlebrush flowers that are fragrant and nectar-rich.

Comptonia peregrina, commonly known as sweet fern for its fragrant, lustrous, fern-like foliage, is a super hardy shrub for terrible, infertile soils.

Convallaria 'Albostriata' is a special form of lily-of-the-valley with green leaves striped with yellow.

Convallaria majalis 'Bordeaux' is an improved version of the old-fashioned lily-of-the-valley with larger and more plentiful flowers.

Convallaria majalis 'Rosea' is a lily-of-the-valley with pale pink, waxy, fragrant, bell-shaped flowers.

Coreopsis tripteris is a 6 foot high tickseed producing masses of bright yellow flowers from summer to fall.

Cornus canadensis, or bunchberry, is an excellent native ground cover for part shade and loose humusy soils.

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

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.

Delosperma nubigenum has bright yellow single flowers that burst into colour in early summer and continue right through fall.

Delosperma 'Red Mountain Flame' is an evergreen ground cover with masses of scarlet flowers accented with magenta and white.

Delphinium elatum 'Celebration' is a large larkspur with semi-double soft lemon to cream flowers.

Delphinium elatum 'Princess Caroline' is a mid-sized larkspur with semi-double flowers in salmon-pink with red streaks.

Delphinium 'Red Lark' is a compact larkspur with fully double flowers in bold coral-red atop lacy green foliage.

Delphinium Highlander 'Bolero' offers ruffly, fully double flowers in shades of lavender purple, blue, and creamy white

Delphinium Highlander 'Cha Cha' is a larkspur with ruffled, fully double flowers in shades of soft lilac-pink with darker eyes.

Delphinium Highlander 'Flamenco' is magnificent with ruffled, fully double flowers in shades of dusky, deep raspberry pink.

Delphinium Highlander 'Moonlight' is magnificent with ruffled, fully double flowers in shades of lilac blue with apple-green centres.

Delphinium Highlander 'Mystery Sensation' is a larkspur with ruffled, fully double flowers in soft shades of pink with yellow centres.

Delphinium New Millennium 'Black Eyed Angels' blooms with dense spikes of frilly, pure white, single flowers with pure black centres.

Delphinium New Millennium 'Blue Buccaneers' offers dense spikes of glowing deep blue, single flowers with black centres.

Delphinium New Millennium 'Blue Lace' blooms with dense spikes of sky blue flowers with a touch of lavender pink.

Delphinium New Millennium 'Cobalt Dreams' blooms with dense spikes of frilly, royal blue to cobalt blue, single flowers with white centres.

Delphinium New Millennium 'Dusky Maidens' blooms with dense spikes in frilly shades of pink and lavender.

Delphinium New Millennium 'Green Twist' blooms with dense spikes of frilly white flowers with streaks of green.

Delphinium New Millennium 'Pagan Purples' blooms with dark royal purple flowers.

Delphinium New Millennium 'Pink Punch' has dense spikes of frilly, mulberry pink, single flowers with white, black or pink centres.

Delphinium New Millennium 'Purple Passion' blooms with dense spikes of frilly, warm, rich, purple, single flowers with white centres.