Campanula persicifolia 'La Belle' is a peachleaf Bellflower double ruffled flowers in sky blue and dark green evergreen leaves.

Campanula portenschlagiana Ambella Dark Blue produces masses of starry, bell-shaped, royal violet flowers so dense you can barely see the foliage.

Campanula portenschlagiana Ambella White produces masses of starry, bell-shaped, pure white flowers so dense you can barely see the foliage.

Campanula poscharskyana Adansa Pink forms spreading mounds covered in pink, starry flowers from mid spring through summer.

Campanula poscharskyana Adansa Purple forms spreading mounds covered in bluish purple, starry flowers from mid spring through summer.

Campanula poscharskyana 'Blue Waterfall' offers masses of starry blue flowers from spring to fall.

Campanula sibirica 'Royal Wedding' blooms in early summer with rich purple tubular flowers on tall stems.

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

Canna Cannova 'Bronze Peach' is a canna lily with striking dark bronze foliage and peach-coloured flowers.

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

Canna 'Durban' is a canna lily with striking variegated foliage or oranges, yellows and green topped with orange flowers.

Canna 'Chocolate Sunrise' has chocolatey-purple leaves topped with bright orange-yellow flowers in summer.

Canna 'Louise Cotton' is a dwarf canna lily that grows from 16 to 18 inches tall with big, dark bronze leaves and yellow flowers.

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

Canna 'Stuttgart' is an unusual canna lily with a more slender habit, heavily variegated leaves with orange-yellow flowers.

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

Capparis spinosa var. inermis is the plant that brings us the delicious capers commonly used in Mediterranean cuisine for their intense flavour.

Carex elata 'Aurea' or Bowles golden sedge is a superlative grass-like plant for sun to shade in average to moist garden soils.

Mounds of glossy green blades when you need something quiet and lush.

Shapely deep green blades with snowy white edges puts Carex Evercolor 'Everest' at the height of evergreen sedges.

Carex Evercolor 'Everglow' has a central green stripe with orange margins from fall to winter.