Plants: G
- Garden Balsam Impatiens balsamina Garden annual
- Garden Lupine Lupinus polyphyllus Wildflower
- Garden Mum Chrysanthemum × morifolium Garden perennial
- Garden Penstemon Penstemon × gloxinioides Garden perennial
- Garden Phlox Phlox paniculata Garden perennial
- Garden Spiderwort Tradescantia × andersoniana Garden perennial
- Garden Verbena Glandularia × hybrida Garden annual
- Gardenia Gardenia jasminoides Herb
- Garland Chrysanthemum Glebionis coronaria Leafy
- Garlic Allium sativum Allium
- Garlic Chives Allium tuberosum Allium
- Gaura Oenothera lindheimeri Garden perennial
- Gazania Gazania rigens Creeping perennial
- Geiger Tree Cordia sebestena Flowering tree
- Geneva Bugleweed Ajuga genevensis Creeping perennial
- Gentian Sage Salvia patens Garden perennial
- Gentian Speedwell Veronica gentianoides Garden perennial
- Georgia Blue Speedwell Veronica peduncularis Creeping perennial
- Geraldton Waxflower Chamelaucium uncinatum Flowering shrub
- Gerbera Daisy Gerbera jamesonii Garden perennial
- German Catchfly Lychnis viscaria Garden perennial
- German Chamomile Matricaria chamomilla Herb
- German Garlic Allium senescens Allium
- German Primrose Primula obconica Garden perennial
- Giant Allium Allium giganteum Bulb
- Giant Blazingstar Mentzelia laevicaulis Wildflower
- Giant Blue Eyed Mary Collinsia grandiflora Wildflower
- Giant Blue Iris Iris giganticaerulea Wildflower
- Giant Coneflower Rudbeckia maxima Garden perennial
- Giant Crinum Crinum asiaticum Bulb
- Giant Desert Candle Eremurus robustus Garden perennial
- Giant Goldenrod Solidago gigantea
- Giant Scabious Cephalaria gigantea Garden perennial
- Giant Snowdrop Galanthus elwesii Garden perennial
- Giant Sunflower Helianthus giganteus Wildflower
- Ginger Zingiber officinale Root
- Glacier Lily Erythronium grandiflorum Wildflower
- Gladiolus Gladiolus × gandavensis Garden perennial
- Globe Amaranth Gomphrena globosa Garden annual
- Globe Gilia Gilia capitata Wildflower
- Globe Thistle Echinops ritro Wildflower
- Globeflower Trollius europeus
- Gloriosa Lily Gloriosa superba Garden perennial
- Glory of the Snow Chionodoxa forbesii Bulb
- Glossy Abelia Abelia × grandiflora Flowering shrub
- Goat's Rue Tephrosia virginiana Wildflower
- Goatsbeard Aruncus dioicus Garden perennial
- Goji Berry Lycium barbarum Berry
- Gold Moss Sedum Sedum acre Creeping perennial
- Goldband Lily Lilium auratum Garden perennial
- Golden Alexanders Zizia aurea Wildflower
- Golden Ball Leadtree Leucaena retusa Flowering tree
- Golden Calla Zantedeschia elliottiana Garden perennial
- Golden Canna Canna flaccida Garden perennial
- Golden Clematis Clematis tangutica Garden perennial
- Golden Columbine Aquilegia chrysantha Garden perennial
- Golden Creeper Ernodea littoralis Creeping perennial
- Golden Currant Ribes aureum Berry
- Golden Dewdrop Duranta erecta Flowering shrub
- Golden Euryops Euryops pectinatus Flowering shrub
- Golden Flax Linum flavum Wildflower
- Golden Garlic Allium moly Bulb
- Golden Globes Lysimachia congestiflora Creeping perennial
- Golden Lace Patrinia scabiosifolia Garden perennial
- Golden Marguerite Anthemis tinctoria Wildflower
- Golden Prairie Clover Dalea aurea Legume
- Golden Ragwort Packera aurea Creeping perennial
- Golden Raspberry Rubus idaeus Berry
- Golden Shower Tree Cassia fistula Flowering tree
- Golden Shrimp Plant Pachystachys lutea Flowering shrub
- Golden St. John's Wort Hypericum frondosum Flowering shrub
- Golden Star Hypoxis hirsuta Creeping perennial
- Golden Trumpet Allamanda cathartica Flowering shrub
- Golden Trumpet Tree Handroanthus chrysotrichus Flowering tree
- Golden Yarrow Eriophyllum confertiflorum Wildflower
- Goldenchain Tree Laburnum × watereri Flowering tree
- Goldfields Lasthenia californica Wildflower
- Goldflame Honeysuckle Lonicera × heckrottii Flowering shrub
- Goodding's Verbena Glandularia gooddingii Creeping perennial
- Goodding's Willow Salix gooddingii
- Gooseberry Ribes uva-crispa Berry
- Gooseberryleaf Globemallow Sphaeralcea grossulariifolia Wildflower
- Gooseneck Loosestrife Lysimachia clethroides Garden perennial
- Gopher Apple Licania michauxii Low shrub
- Grand Collomia Collomia grandiflora Garden annual
- Grape Vitis vinifera Fruiting
- Grape Hyacinth Muscari armeniacum Bulb
- Grapefruit Citrus x paradisi Tree fruit
- Grass-Leaved Goldenrod Euthamia graminifolia Wildflower
- Grassy-Leaved Sweet Flag Acorus gramineus Creeping perennial
- Gray Dogwood Cornus racemosa Flowering shrub
- Gray Globemallow Sphaeralcea incana
- Gray Goldenrod Solidago nemoralis Wildflower
- Gray's Biscuitroot Lomatium grayi Wildflower
- Gray-Headed Coneflower Ratibida pinnata Wildflower
- Grayleaf Cranesbill Geranium cinereum Garden perennial
- Great Bellflower Campanula latifolia Garden perennial
- Great Blue Lobelia Lobelia siphilitica Wildflower
- Great Camas Camassia leichtlinii Bulb
- Great Valley Gumweed Grindelia camporum Wildflower
- Great Valley Phacelia Phacelia ciliata
- Great White Trillium Trillium grandiflorum Wildflower
- Greater Tickseed Coreopsis major Garden perennial
- Greater Woodrush Luzula sylvatica Creeping perennial
- Grecian Windflower Anemone blanda Garden perennial
- Green and Gold Chrysogonum virginianum Creeping perennial
- Green Antelopehorn Asclepias viridis Wildflower
- Green Bean Phaseolus vulgaris Legume
- Green Comet Milkweed Asclepias viridiflora Wildflower
- Green Hawthorn Crataegus viridis
- Green Tea Camellia sinensis var. sinensis Leafy
- Greenleaf Manzanita Arctostaphylos patula Flowering shrub
- Gregg's Mistflower Conoclinium greggii Creeping perennial
- Greigii Tulip Tulipa greigii Bulb
- Ground Cherry Physalis pruinosa Fruiting
- Ground Juniper Juniperus communis var. depressa Creeping perennial
- Ground Morning Glory Convolvulus sabatius Creeping perennial
- Ground Plum Astragalus crassicarpus Legume
- Groundnut Apios americana Root
- Groundsel Bush Baccharis halimifolia Flowering shrub