Gladiolus 'Easter Parade' Gladiolus 'Flevo Junior'
Gladiolus 'Lemon Meringue' Gladiolus 'Midnight Moonlight'
Gladiolus 'Purple Flame' Gladiolus callianthus
Gladiolus communis ssp. byzantinus Gladiolus x hortulanus
Gladiolus nanus 'Atom' Gladiolus papilio
Gladiolus tristis Glechoma hederacea
Glechoma hederacea 'Variegata' Globba marantina 'Yellow Dancing Girl'
Globba winitii Globba winitii 'White Dragon'
Gloriosa superba Gloriosa superba 'Rothschildiana'
Glottiphyllum latum Glottiphyllum linguiforme
Glottiphyllum oligocarpum Gloxinia nematanthodes 'Evita'
Gloxinia sylvatica Gloxinia sylvatica 'Bolivian Sunset'
Glyceria maxima var. variegata Gnaphalium spp. 'Fairy Gold'
Gongora truncata Goniolimon tartaricum
Goodenia ovata Goodyera pubescens
Graptopetalum paraguayense Graptoveria 'Debbie'
Grindelia stricta ssp. venulosa Gunnera manicata
Gunnera tinctoria Guzmania x 'Orangeade'
Guzmania x 'Rana' Guzmania x 'Spendreit'
Guzmania x 'Vella Red' Guzmania 'Ada'
Guzmania 'Irene' Guzmania 'Marjan'
Guzmania 'Symphonic' Guzmania amaranth
Guzmania lingulata 'Minor' Guzmania sanguinea
Gymnaster savatieri Gymnocalycium bruchii var. albiepimun
Gymnocalycium denudatum Gymnocalycium multiflorum
Gymnocarpium dryopteris Gymnocarpium dryopteris 'Plumosum'
Gynura aurantiaca Gynura aurantiaca 'Purple Passion'
Gynura bicolor Gypsophila x 'Rose Schonheir'
Gypsophila cerastioides Gypsophila paniculata
Gypsophila paniculata 'Bristol Fairy' Gypsophila paniculata 'Compacta Plena'
Gypsophila paniculata 'Festival' Gypsophila paniculata 'Festival Star Baby's Breath'
Gypsophila paniculata 'Happy Festival' Gypsophila paniculata 'Perfecta'
Gypsophila paniculata 'Pink Fairy' Gypsophila repens 'Rosea'
Habenaria lacera Habenaria rhodochelia
Habranthus robustus Habranthus robustus 'Russell Manning'
Habranthus tubispathus Haemanthus coccineus
Hakonechloa macra 'Albo Strata' Hakonechloa macra 'All Gold'
Hakonechloa macra 'Aureola' Hakonechloa macra 'Beni-Kaze'
X Hamelwellsara 'Indigo Sue' Haplopappus glutinosus
Hardenbergia violacea Hardenbergia violacea 'Happy Wanderer'
Hatiora gaertneri Haworthia cymbiformis ssp. setulifera
Haworthia fasciata Haworthia limifolia var. keithii
Haworthia reinwardtii var. reinwardtii Haworthia spp.
Hebe topiaria Hechtia stenopetala