Gum Tragacanth Gum Tragacanth: balearicus
Gum Tragacanth: crassicarpus Gumbo Lily
Gunnera: tinctoria Guzmania 'Minor'
Guzmania 'Orangeade' Guzmania 'Rana'
Guzmania 'Spendreit' Guzmania 'Vella Red'
Guzmania: amaranth Guzmania: sanguinea
'Haarswell Haze' Siberian Iris 'Habanera MIx' English Daisy
'Habanera White/Rose' English Daisy 'Hadspen Cream' Siberian Bugloss
'Haense Hermes' Switch Grass Hair Fescue Grass
Hair Grass (spp.) Hair Grass 'Gold Selection'
Hair Grass 'Goldgehaenge(Gold Shower)' Hair Grass 'Northern Lights'
Hair Grass 'Schottland(Scotland)' Hairy Alum Root (spp.)
Hairy Alum Root 'Autumn Bride' Hairy Alum Root 'Night Watch'
Hairy Alum Root 'Purpurea' Hairy Alumroot (spp.)
Hairy Alumroot 'Autumn Bride' Hairy Alumroot 'Night Watch'
Hairy Alumroot 'Purpurea' Hairy Dewflower
Hairy Lip Fern Hairy Loosestrife (spp.)
Hairy Loosestrife 'Atropurpurea' Hairy Loosestrife 'Firecracker'
Hairy Loosestrife 'Purpurea' Hairy Toad Lily (spp.)
Hairy Toad Lily 'Golden Gleam' Hairy Toad Lily 'Miyazaki'
Hairy Toad Lily Variegated Hairy Toad Lily: hybrid 'Empress'
Hairy Toad Lily: hybrid 'Hatatogisa' Hairy Toad Lily: hybrid 'Kohaku'
Hairy Toad Lily: hybrid 'Lightning Strike' Hairy Toad Lily: hybrid 'Shining Light'
Hairy Toad Lily: hybrid 'Taipei Silk' Hairy Toad Lily: hybrid 'Tojen'
'Hakone Blue' Balloon Flower Hakone Grass 'Albo Strata'
Hakone Grass 'All Gold' Hakone Grass 'Beni-Kaze'
Halberd Leaved Violet 'Halcyon' Hosta
'Hall's Pink' Daylily 'Hamelin' Chinese Fountain Grass
Hammock Fern 'Hanafubuki' Picotee Morning Glory
'Hanajina' Blue Clematis 'Hanakisoi' Japanese Tree Peony
Hand Fern Hanging Geranium (spp.)
Hanging Geranium 'Colorcade Lavender' Hanging Geranium 'Sunset'
'Hankie' Florist's Chrysanthemum Haplopappus
'Happy Festival' Baby's Breath 'Happy Returns' Daylily
'Happy Wanderer' Lilac Vine Hard Fern
Hardy Ageratum Hardy Aloe
Hardy Amaryllis Hardy Begonia
Hardy Begonia: grandis Hardy Biokova Geranium (spp.)
Hardy Biokova Geranium 'Biokovo' Hardy Biokova Geranium 'Biokovo Karmina'
Hardy Century Plant Hardy Chrysanthemum 'Cambodian Queen'
Hardy Gloxinia 'Evita' Hardy Gloxinia (spp.)
Hardy Gloxinia 'Snowtop' Hardy Grape Leaf Anemone 'Robustissima'
Hardy Ice Plant 'Starburst' Hardy Orange Gloxinia
Hardy Orchid Hardy Pampas Grass
Hardy Zinnia (spp.) Hardy Zinnia 'Ballerina'
Hardy Zinnia 'Summer Sun'