Hard Maple (spp.) Hard Maple 'Ann Rutledge'
Hard Maple 'Arrowhead' Hard Maple 'Coleman'
Hard Maple 'Commemoration' Hard Maple 'Eagle Claw'
Hard Maple 'Endowment' Hard Maple 'Globosum'
Hard Maple 'Goldspire' Hard Maple 'Legacy'
Hard Maple 'Newton Sentry' Hard Maple 'Seneca Chief'
Hard Maple 'Skybound' Hard Maple 'Sweet Shadow'
Hard Maple 'Temple's Upright' Hardy Hibiscus (spp.)
Hardy Hibiscus 'Armande' Hardy Hibiscus 'Azurri Blue Satin®'
Hardy Hibiscus 'Blue Chiffon™' Hardy Hibiscus 'Buc de Brabant'
Hardy Hibiscus 'China Chiffon™' Hardy Hibiscus 'Cicola'
Hardy Hibiscus 'Floru(Violet Satin®)' Hardy Hibiscus 'Lavender Chiffon™'
Hardy Hibiscus 'Lil' Kim™' Hardy Hibiscus 'Marina(Blue Satin®)'
Hardy Hibiscus 'Minrosa (Rose Satin®)' Hardy Hibiscus 'Pink Chiffon™'
Hardy Hibiscus 'Pink Petticoat' Hardy Hibiscus 'Purpureus Variegatus'
Hardy Hibiscus 'Roseus Plenus' Hardy Hibiscus 'Russian Violet'
Hardy Hibiscus 'Sugar Tip®' Hardy Hibiscus 'Totus Albus'
Hardy Hibiscus 'White Chiffon™' Hardy Zinnia (spp.)
Hardy Zinnia 'Ballerina' Hardy Zinnia 'Summer Sun'
'Harlequin' Japanese Barberry Harmomy Manzanita
'Harmonic Convergence' Alumroot: Heuchera 'Harry Edland' Rose
'Harvest Gold™' Flowering Crabapple 'Hasse' Southern Magnolia
Hat Palm Hatpin Cactus
Haw, Possum (spp.) Haw, Possum 'Brandywine™'
Haw, Possum 'Winterthur' Haw, Swamp (spp.)
Haw, Swamp 'Brandywine™' Haw, Swamp 'Winterthur'
Hawaiian Hibiscus (spp.) Hawaiian Hibiscus 'Hawaiian Salmon'
Hawaiian Hibiscus 'Jason' Hawaiian Hibiscus 'Snow Queen'
'Hawaiian Salmon' Chinese Hibiscus Hawthorn, Apple
Hawthorn, English (spp.) Hawthorn, English 'Paul's Scarlet'
Hawthorn, Green 'Winter King' Hawthorn, Indian 'Olivia'
Hawthorn, May Hawthorn, Southern 'Winter King'
Hawthorn, Washington Hawthorn: monogyna, English (spp.)
Hawthorn: monogyna, English 'Inermis Compacta' Hay Fever Weed
Hazelnut, American Hazelnut: americana
'Heart of Fire' Mountain Laurel 'Hearts Afire' Daylily
'Heart's Desire' Mountain Laurel 'Heatherbun' Atlantic White Cedar
Heavenly Bamboo (spp.) Heavenly Bamboo 'Firepower'
Heavenly Bamboo 'Harbor Belle™' Heavenly Bamboo 'Moon Bay'
Heavenly Bamboo 'Nana Purpurea' Heavenly Bamboo 'Okame'
Heavenly Bamboo 'Wood's Red' 'Heavy Metal' Switch Grass
Hedge Coneflower (spp.) Hedge Coneflower 'Bright Star'
Hedge Coneflower 'Kim's Knee High' Hedge Coneflower 'Kim's Mophead'
Hedge Coneflower 'Magnus' Hedge Coneflower 'Ruby Star'
Hedge Coneflower 'White King' Hedge Coneflower 'White Swan'
Hedge Cotoneaster Hedge Nettle, White
Hedge Nettle, Whitestem Hedgehog Agave
'Heidi' Columbine Heliopsis, Sunflower (spp.)
Heliopsis, Sunflower 'Ballerina' Heliopsis, Sunflower 'Summer Sun'
Hell Vine (spp.)