Henbit Dead Nettle Henderson's Shooting Star
'Hennie Graafland' Dwarf Astilbe 'Henry Eilers' Sweet Coneflower
'Henry III' New York Aster Henry's Lily
Hens and Chicks 'Kalinda' Hens and Chicks, Mexican
Hens and Chicks: canariense Hens and Chicks: pumilum
Hepatica Hepatica, Round Lobed
Hepatica, Sharp-lobed 'Hephestos' Japanese Tree Peony
Herb of Grace (spp.) Herb of Grace 'Blue Showers'
Herb of Grace 'Snowflake' Herb of Grace: graveolens (spp.)
Herb Peter (spp.) Herb, Felon (spp.)
Herb, Felon 'Oriental Limelight' 'Herbal Rose' Sweet Scented Geranium
'Herbstsonne' Shiny Coneflower 'Herman's Pride' Yellow Archangel
'Hermine' Waterlily Heron's Bill Geranium White
Heron's Bill 'Roseum' Heron's Bill 'Stork Bill Pink'
'Heronswood Mist' Foamflower: Tiarella 'Herrenhausen' Ornamental Oregano
'Herringbone Plant' Prayer Plant Hesperaloe, Giant
Hesperaloe, Night Blooming Hesperaloe, Red
'Hesperus' Daylily 'Heuros' Alumroot: Heuchera
'HGC Green Corsican' Christmas Rose 'HGC Jacob' Christmas Rose
'HGC Josef Lemper' Christmas Rose 'HGC Silvermoon' Winter Rose
'Hi Ho Silver' Hosta Hibiscus, Annual 'Pacific Scarlet'
Hibiscus, Red Leaf (spp.) Hibiscus, Red Leaf 'Coppertone (Red Shield)'
Hibiscus, Red Leaf 'Jungle Red' Hibiscus, Sweet
'Hidcote Pink' Bearded Tongue: Penstemon Hidden Lily Ginger (spp.)
Hidden Lily Ginger 'Emperor' Hidden Lily Ginger: roscoeana (spp.)
Hidden Lily Ginger: roscoeana 'White Flame' Hidden Lily Ginger: zedoaria
'Hidden World' Tall Bearded German Iris 'High Contrast' Lungwort: hybrid
High Mallow 'Zebrina' 'Highland Cream' Creeping Thyme
'Hillside Pink Sheffield' Florist's Chrysanthemum 'Hilo Beauty' Elephant's Ear: Alocasia
'Hilo Holiday' Rex Begonia Himalayan Blue Poppy (spp.)
Himalayan Blue Poppy 'Lingholm' Himalayan Fleece Flower (spp.)
Himalayan Fleece Flower 'Border Jewel' Himalayan Foxtail Lily
Himalayan Gloxinia Himalayan Mint Shrub
'Hime-kan-suge' Sedge Hindu Datura (spp.)
Hindu Datura 'Flore Pleno' Hindu Rope Plant (spp.)
Hindu Rope Plant Variegated Hinkley's Yellow Columbine
'Hobbit' Fescue 'Hoffman's Red' Border Pink
'Hoki' Japanese Tree Peony Hollowleaf Annual Lupine
Holly Fern (spp.) Holly Fern Variegated
Holly Fern: falcatum Holly Fern: nepalense
'Holly Herrema' Daylily Holly, Alpine Sea (spp.)
Holly, Flat Sea (spp.) Holly, Flat Sea 'Blaukappe'
Holly, Flat Sea 'Jade Frost' Holly, Mediterranean Sea
Holly, Moroccan Sea Holly, Sea 'Sapphire Blue'
Holly, Sea (spp.) Holly: maritimum, Sea (spp.)
Holly: minor, English (spp.) Holly: minor, English 'Bowle's Variety'
Holly: minor, English 'Illumination' Holly: minor, English 'Sterling Silver'
Holly: minor, English Variegated Holly: tripartitumhybrid, Sea
Holly: venustum, Sea Hollyhock Mallow (spp.)
Hollyhock Mallow 'Fastigiata' Hollyhock (spp.)
Hollyhock 'Summer Memories' Hollyhock 'Chater's Double'
Hollyhock 'Creme de Cassis' Hollyhock 'Peaches 'n' Dreams'
Hollyhock 'Queeny Purple' Hollyhock 'Summer Carnival'
Hollyhock 'The Watchman' Hollyhock, Antwerp
Hollyhock, Desert Hollyhock, French 'Zebrina'
Hollyhock: officinalis Hollyhock: rugosa
'Holly's Honey' Hosta