| Calamagrostis x a. 'Karl Foerster' | Feather Reed Grass |
| Calamagrostis x a. 'Overdam' | Feather Reed Grass |
| Calamintha grandiflora | Calamint |
| Calamintha grandiflora 'Variegata' | Variegated Calamint |
| Callicarpa bodinieri 'Profusion' | Beautyberry |
| Callicarpa dichotoma | Beautyberry |
| Callirhoe involcrata | Wine Cups |
| Caltha palustris 'Alba' | Marsh Marigold, White |
| Campanula carpatica 'Blue Clips' | Bellflower |
| Campanula carpatica 'White Clips' | Bellflower |
| Campanula 'Chettle Charm' | Bellflower |
| Campanula garganica 'Dickson's Gold' | Bellflower |
| Campanula persicifolia 'Blue' | Bellflower |
| Campanula persicifolia 'Peach Leaf' | Bellflower |
| Campanula poscharskyana | Bellflower |
| Campanula punctata 'Cherry Bells' | Bellflower |
| Campanula punctata 'Kent Belle' | Bellflower |
| Campanula punctata 'Wedding Bells' | Bellflower |
| Campanula r. 'Olympica' | Bellflower |
| Campanula t. 'Bernice' | Bellflower |
| Campanula takesimana 'Beautiful Trust' | Bellflower |
| Campanula x 'Birchs Hybrid' | Bellflower |
| Campsis radicans | Trumpet Vine |
| Canna 'Stuttgart' | Canna |
| Capparis spinosa | Caper Bush |
| Cardiocrinum giganteum | Giant Himalayan Lily |
| Carex buchananii | Leatherleaf Sedge |
| Carex elata 'Bowles Golden' | Sedge |
| Carex morrowii 'Ice Dance' | Sedge |
| Carex muskingumensis 'Little Midge' | Sedge, Miniature Palm |
| Carex nigra | Sedge, Black Fowering |
| Carex testacea | Orange Sedge |
| Caryopteris divaricata 'Snow Fairy' | Blue Mist Spirea |
| Caryopteris 'First Choice' | Blue Mist Spirea |
| Caryopteris 'Worchester Gold' | Blue Mist Spirea |
| Catananche caerulea | Cupid's Dart |
| Ceanothus g. 'Louis Edmunds' | California Lilac |
| Ceanothus 'Victoria' | California Lilac |
| Centaurea dealbata 'Rosea' | Cornflower |
| Centaurea montana 'Blue' | Cornflower |
| Centaurea montana 'Gold Bullion' | Cornflower |
| Centranthus ruber 'Coccineus' | Red Valerian |
| Ceratostigma 'Imperial Blue' | Plumbago |
| Ceratostigma plumbaginoides | Plumbago |
| Cercidiphyllum japonicum 'Morioka Weeping' | Katsura, Weeping |
| Cerinthe m. p. 'Kiwi Blue' | Honeywort |
| Chasmanthium latifolium | Northern Sea Oats |
| Chelone Iyonii 'Hot Lips' | Turtlehead |
| Chelone oblique | Turtlehead |
| Chelone oblique 'Alba' | Turtlehead |
| Chelonopsis yagiharana | Chelonopsis |
| Choisya ternata 'Sundance' | Golden Mexican Orange |
| Cistus 'Silver Pink' | Rock Rose |
| Cistus 'Sunset' | Rock Rose |
| Claytonia caroliniana | Carolina Spring Beauty |
| Claytonia sibirica | Pink Purslane |
| Claytonia virginica | Spring Beauty |
| Clematis 'Alionushka' | Clematis |
| Clematis 'Barbara' | Clematis |
| Clematis 'Bee's Jubilee' | Clematis |
| Clematis 'Belle of Woking' | Clematis |
| Clematis 'Early Sensation' | Clematis |
| Clematis 'Ernest Markham' | Clematis |
| Clematis 'Etiole Violette' | Clematis |
| Clematis integrifolia | Clematis |
| Clematis integrifolia 'Rosea' | Clematis |
| Clematis 'Jackmanii' | Clematis |
| Clematis 'Nelly Moser' | Clematis |
| Clematis 'Princesse Alexandra' | Clematis |
| Clematis recta 'Purpurea' | Clematis |
| Clematis v. 'Polish Spirit' | Clematis |
| Clematis x jouiniana 'Mrs Robert Brydon' | Clematis |
| Clethra a. 'Hokie Pink' | Summersweet |
| Convallaria m. 'Rosea' | Lily-of-the-Valley |
| Convallaria majalis | Lily-of-the-Valley |
| Convolvulus cneorum | Silverbush |
| Coreopsis 'Crème Brulee' | Tickseed |
| Coreopsis g. 'Early Sunrise' | Tickseed |
| Coreopsis lanceolata 'Sterntaler' | Tickseed |
| Coreopsis 'Limerock Ruby' | Tickseed |
| Coreopsis r. 'American Dream' | Tickseed |
| Coreopsis r. 'Sweet Dreams' | Tickseed |
| Coreopsis 'Rosea' | Tickseed |
| Coreopsis v. 'Moonbeam' | Tickseed |
| Cornus canadensis | Bunchberry |
| Cornus sanguinea 'Midwinter Fire' | Redtwig Dogwood |
| Cortaderia selloana | Pampas Grass, White |
| Cortaderia selloana 'Pumila' | Pampas Grass, Dwarf |
| Cortaderia selloana 'Rosea' | Pampas Grass, Pink |
| Corydalis 'Blackberry Wine' | Corydalis |
| Corydalis chelianthifolia | Corydalis |
| Corydalis elata | Corydalis |
| Corydalis f. 'Blue Panda' | Corydalis |
| Corydalis f. 'China Blue' | Corydalis |
| Corydalis f. 'Golden Panda' | Corydalis |
| Corydalis f. 'Purple Leaf' | Corydalis |
| Corydalis leucanthema 'Silver Spectre' | Corydalis |
| Corydalis lutea | Corydalis |
| Corydalis sempervirens | Corydalis |
| Cosmos a. 'Chocolate' | Cosmos |
| Cotinus cogg. 'Golden Spirit' | Smoke Tree |
| Cotoneaster dammeri | Bearberry |
| Crambe cordifolia | Crambe |
| Crocosmia 'Bressingham Beacon' | Montbretia |
| Crocosmia 'Constance' | Montbretia |
| Crocosmia 'Emily McKenzie' | Montbretia |
| Crocosmia 'George Davison' | Montbretia |
| Crocosmia 'Irish Sunset' | Montbretia |
| Crocosmia 'Little Redhead' | Montbretia |
| Crocosmia 'Lucifer' | Montbretia |
| Crocosmia masoniorum | Montbretia |
| Crocosmia 'Meteore' | Montbretia |
| Crocosmia 'Red King' | Montbretia |
| Crocosmia 'Severn Seas' | Montbretia |
| Crocosmia 'Solfaterre' | Montbretia |
| Crocosmia 'Star of the East' | Montbretia |
| Crocosmia 'Woodside Select' | Montbretia |
| Curcuma austalasica 'Aussie Plume' | Ginger, Flowering |
| Cyathea cooperi 'Brentwood' | Australian Tree Fern |
| Cyclamen coum | Cyclamen, Hardy |
| Cyclamen hederifolium | Cyclamen, Hardy |
| Cynara cardunculus | Cardoon |
| Cyperus longus | hardy Umbrella Grass |
| Cyrtomium caryotideum | Dwarf Fishtail Holly Fern |
| Cyrtomium falcatum | Holly Fern |
| Cyrtomium falcatum maritimum | Mini Holly Fern |
| Cyrtomium fortunei | Fortune's Holly Fern |
| Cyrtomium macrophyllum | Big Leaf Holly Fern |
| Dalea purpureum 'Stephanie' | Prairie Clover |
| Darmera peltatum | Umbrella Plant |
| Delphinium grandiflora 'Blue Butterfly' | Delphinium |
| Delphinium 'Magic Fountain Mix' | Delphinium |
| Delphinium Pacific Giant 'Black Knight' | Delphinium |
| Delphinium Pacific Giant 'Galahad' | Delphinium |
| Delphinium Pacific Giant 'Guinevere' | Delphinium |
| Delphinium Pacific Giant 'Summer Skies' | Delphinium |
| Dendranthema 'Clara Curtis' | Garden Mum |
| Dennstaedtia punctilobula | Hay Scented Fern |
| Deschampsia c. 'Northern Lights' | Hairgrass |
| Deutzia gracilis 'Nikko' | Deutzia |
| Deutzia x kalmiiflora | Deutzia |
| Dianthus c. 'Grenadin Pink' | Carnation |
| Dianthus c. 'Grenadin Red' | Carnation |
| Dianthus c. 'Grenadin White' | Carnation |
| Dianthus c. 'Yellow' | Carnation |
| Dianthus deltoides 'Flashing Light' | Pinks |
| Dianthus 'Neon Star' | Carnation |
| Dianthus x 'Mountain Mist' | Pinks |
| Diascia integerrima 'Coral Canyon' | Twin Spur |
| Dicentra 'Aurora' | Bleeding Heart |
| Dicentra eximia | Bleeding Heart |
| Dicentra formoma 'Bacchanal' | Bleeding Heart |
| Dicentra 'King of Hearts' | Bleeding Heart |
| Dicentra spectabilis | Bleeding Heart |
| Dicentra spectabilis 'Alba' | Bleeding Heart |
| Dicentra spectabilis 'Gold Heart' | Bleeding Heart |
| Dichromena colorata | Star Grass |
| Dicksonia antarctica | Tasmanian Tree Fern |
| Dierama p. 'Slieve Donard Hybrids' | Angel's Fishing Rod |
| Dierama pulcherrima | Angel's Fishing Rod |
| Digitalis mertonensis | Strawberry Foxglove |
| Digitalis purpurea 'Foxy' | Foxglove |
| Dionaea muscipula 'Dente' | Venus Fly Trap |
| Disanthus cercidifolius | Redbud Hazel |
| Disporopsis pernyi | Evergreen Solomon's Seal |
| Disporum maculatum | Spotted Mandarin |
| Dodecatheon Jeffreyi | Shooting Star |
| Dodecatheon meadia | Shooting Star |
| Doronicum orientale 'Little Leo' | Leopard's Bane |
| Doryopteris pedata | Hand Fern |
| Dryopteris affinis Cambrensis | Golden-Scaled Male Fern |
| Dryopteris atrata | Shaggy Shield Fern |
| Dryopteris bissetiana | Beaded Wood Fern |
| Dryopteris clintoniana | Clinton's Wood Fern |
| Dryopteris dilatata 'Jimmy Dyce' | Jimmy Dyce Fern |
| Dryopteris dilatata 'Lepidota Cristata' | Beautiful Broad Buckler |
| Dryopteris erythrosora | Autumn Fern |
| Dryopteris erythrosora 'Brillance' | Brilliance Autumn Fern |
| Dryopteris filix-mas 'Linearis Polydactyla' | Many Fingered Male Fern |
| Dryopteris hybrid 'Robust Male' | Robust Male Fern |
| Dryopteris lepidopoda cristata | Crested Sunset Fern |
| Dryopteris marginalis | Leatherwood Fern |
| Dryopteris wallichiana | Wallich's Wood Fern |
| Dryopteris x. australis | Dixie Wood Fern |
| Echinacea 'Orange Meadowbrite' | Coneflower |
| Echinacea p. 'White Swan' | Coneflower |
| Echinacea 'Paradox' | Coneflower |
| Echinacea purpurea 'Doubledecker' | Coneflower |
| Echinacea purpurea 'Fragrant Angel' | Coneflower |
| Echinacea purpurea 'Little Giant' | Coneflower |
| Echinacea purpurea 'Magnus' | Coneflower |
| Echinacea purpurea 'Ruby Giant' | Coneflower |
| Echinacea 'Sparkler' | Coneflower |
| Echinodorus muricatus | Radican Sword |
| Echinops b. 'Blue Glow' | Globe Thistle |
| Echinops ritro | Globe Thistle |
| Elettaria cardamomum | Cardamom |
| Enkianthus c. 'Showy Lanterns' | Enkianthus |
| Epimedium cantabrigiense | Barrenwort |
| Epimedium g. 'Lilafee' | Barrenwort |
| Epimedium perr. 'Frohnleiten' | Barrenwort |
| Epimedium pinn. ssp. Colchicum | Barrenwort |
| Epimedium rubrum | Barrenwort |
| Epimedium v. 'Sulphureum' | Barrenwort |
| Epimedium young. 'Niveum' | Barrenwort |
| Epimedium young. 'Roseum' | Barrenwort |
| Eremurus 'Ruiter Hybrid' | Foxtail Lily |
| Eremurus stenophyllus | Foxtail Lily |
| Erica erigena 'Brightness' | Heath |
| Erica x darleyensis 'JW Porter' | Heath |
| Erica x darleyensis 'Kramers Rote' | Heath |
| Erica x darleyensis 'Marg. Porter' | Heath |
| Erica x darleyensis 'Mary Helen' | Heath |
| Erigeron hyb. 'Sea Breeze' | Fleabane |
| Eriophorum angustifolium | Cottongrass |
| Eryngium a. 'Blue Star' | Sea Holly |
| Eryngium planum 'Blaukappe' | Sea Holly |
| Eryngium planum 'Blue Ribbon' | Sea Holly |
| Erythronium americanum | Trout Lily |
| Eucalyptus citriodora | Eucalyptus, Lemon Scented |
| Eucalyptus 'Silverdollar' | Eucalyptus |
| Eucomis comosa 'Oakhurst' | Pineapple Lily |
| Euonymus fortunei 'Emerald Gaiety' | Euonymus |
| Eupatorium maculatum 'Atropurpureum' | Joe-Pye Weed |
| Eupatorium maculatum 'Gateway' | Joe-Pye Weed |
| Eupatorium rugosa 'Chocolate' | Snakeroot, Chocolate White |
| Euphorbia characias 'Tasmanian Tiger' | Spurge |
| Euphorbia 'Excalibur' | Spurge |
| Euphorbia 'First Blush' | Spurge |
| Euphorbia g. 'Fireglow' | Spurge |
| Euphorbia 'Jessie' | Spurge |
| Euphorbia n. 'Blue haze' | Spurge |
| Euphorbia polychroma | Spurge |
| Euphorbia 'Red Wing' | Spurge |
| Euphorbia var. robbiae | Spurge |
| Euphorbia wulfenii | Spurge |
| Euphorbia x martinii | Spurge |
| Euryops chrysanthemoides 'Purfled' | Daisy Bush |
| Fallopia aubertii 'Lemon Lace' | Lemon Lace Vine |
| Farfugium tussilaginea 'Cristata' | Farfugium |
| Festuca glauca 'Elijah Blue' | Blue Fescue |
| Festuca 'Golden Toupee' | Fescue, Golden |
| Filipendula rubra 'Venusta Magnifica' | Meadowsweet |
| Filipendula ulmaria 'Variegata' | Queen of the Meadow |
| Filipendula v. 'Flore Pleno' | Meadowsweet |
| Fothergilla gardenii 'Mt Airy' | Fothergilla |
| Francoa sonchifolia | Bridal Wreath |
| Fuchsia 'Blue Eyes' | Fuchsia, Hardy |
| Fuchsia 'Carmel Blue' | Fuchsia, Hardy |
| Fuchsia 'Checkerboard' | Fuchsia, Hardy |
| Fuchsia erecta | Fuchsia, Hardy |
| Fuchsia 'Gartenmeister Bonstedt' | Fuchsia |
| Fuchsia 'Lady Thumb' | Fuchsia, Hardy |
| Fuchsia m. var. m. 'Sharpitor Aurea' | Fuchsia, Hardy |
| Fuchsia 'Madame Cornelissen' | Fuchsia, Hardy |
| Fuchsia magellanica 'Aurea' | Fuchsia, Hardy |
| Fuchsia magellanica 'Riccartonii' | Fuchsia, Hardy |
| Fuchsia 'Santa Clause' | Fuchsia, Hardy |
| Fuchsia 'Saturnus' | Fuchsia, Hardy |
| Fuchsia 'Tom Thumb' | Fuchsia, Hardy |
| Fuchsia 'Winston Churchill' | Fuchsia, Hardy |
