Calamagrostis acutiflora 'Avalanche'

Calamagrostis acutiflora 'Karl Foerster'

Calamagrostis acutiflora 'Overdam'

Calamagrostis brachytricha

Calamintha n 'White Cloud'

Calluna vulgaris 'Alba Erecta'

Calluna vulgaris 'Beoley Gold'

Calluna vulgaris 'Rosea'

Calluna vulgaris 'Silver Knight'

Campanula carpatica 'Blue Clips'

Campanula carpatica 'White Clips'

Campanula p 'Waterfall'

Campsis radicans

Campsis radicans 'Flava'

Campsis t 'Madame Galen'

Carex 'Bowles Golden'

Carex dolichostachya 'Gold Fountains'

Carex glauca

Carex morrowii 'Ice Dance'

Carex morrowii 'Silver Sceptre'

Carex oshimensis 'Evergold'

Carex pensylvanica

Caryopteris c 'Inoveris Grand Bleu'

Caryopteris d 'Snow Fairy'

Centaurea montana

Centranthus ruber 'Coccineus'

Ceratostigma plumbaginoides

Chasmanthium latifolium

Chasmanthium latifolium 'River Mist'

Chelone glabra

Chelone lyonii 'Hot Lips'

Chrysanthemum nipponicum

Chrysogonum virginianum

Clematis 'Bee's Jubilee'

Clematis 'Carnaby'

Clematis 'Comtesse de Bouchard'

Clematis 'Duchess of Edinburgh'

Clematis 'Elsa Spath'

Clematis 'Ernest Markham'

Clematis 'Hagley Hybrid'

Clematis 'Henryii'

Clematis 'Jackmanii'

Clematis 'Miss Bateman'

Clematis 'Mrs N Thompson'

Clematis 'Multi-Blue'

Clematis 'Nelly Moser'

Clematis 'Niobe'

Clematis 'Polish Spirit'

Clematis 'Ramona'

Clematis 'The President'

Clematis 'Ville de Lyon'

Clematis montana 'Rubens'

Clematis paniculata

Clethra a 'Ruby Spice'

Clethra alnifolia

Comptonia peregrina

Convallaria majalis

Common Name: Lily of the Valley

Coral Drift Rose 'Coral Drift Rose'

Coreopsis 'Full Moon'

Coreopsis 'Route 66'

Coreopsis g 'Heliot'

Coreopsis grandiflora 'Early Sunrise'

Coreopsis l 'Walter'

Coreopsis rosea 'American Dream'

Coreopsis verticillata 'Moonbeam'

Coreopsis verticillata 'Sienna Sunset'

Coreopsis verticillata 'Zagreb'

Cortaderia selloana

Cortaderia selloana 'Andes Silver'

Cortaderia selloana 'Pumila'

Cortaderia selloana 'Rosea'

Corydalis 'Blackberry Wine'

Corydalis elata

Crocosmia 'Bright Eyes'

Crocosmia 'Miss Scarlett'

Cyrtomium falcatum 'Japanese Holly Fern'