Gerbera jamesonii Geum chiloense 'Mrs. Bradshaw'
Geum coccineum 'Borisii' Geum x heldreichii
Geum x heldreichii 'Georgenberg' Geum reptans
Geum rivale Geum triflorum
Gibbaeum dispar Gilia tricolor
Gillenia trifoliata 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' Gomphrena globosa
Gomphrena globosa 'Gnome Pink' Gomphrena globosa 'Lil Pinkies'
Gomphrena globosa 'Strawberry Fields' Gongora truncata
Goniolimon tartaricum Goodenia ovata
Goodyera pubescens Gossypium herbaceum 'Nigra'
Gossypium hirsutum Gossypium hirsutum 'Red Leaf'
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 elegans
Gypsophila muralis 'Gypsy' Gypsophila muralis 'Gypsy Deep Rose'
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