Hair Grass: acicularis Hairy Alum Root (spp.)
Hairy Alum Root 'Night Watch' Hairy Alumroot (spp.)
Hairy Alumroot 'Night Watch' Hairy Ceanothus
Hairy Hop tree (spp.) Hairy Hop tree Golden
Hairy Lip Fern Hairy Loosestrife (spp.)
Hairy Loosestrife 'Purpurea' Hairy Sophora
Halberd Leaved Violet 'Halka' Thornless Honey Locust
Hally Jolivette Cherry 'Happy Face® Pink Paradise' Shrubby Cinquefoil
'Happy Face® White' Shrubby Cinquefoil 'Happy Face® Yellow' Shrubby Cinquefoil
Hard Fern 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'
Hardback Hardy Ageratum
Hardy Bamboo Palm Hardy Catalpa (spp.)
Hardy Catalpa 'Pulveralenta' Hardy Zinnia (spp.)
Hardy Zinnia 'Ballerina' Hardy Zinnia 'Summer Sun'
Harlequin Blueflag 'Harlequin' French Marigold
'Harlequin Mix' Dahlia Harmomy Manzanita
'Harmony' Oakleaf Hydrangea Hartweg's Sundrops
'Harvest Amanda' Dahlia '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'
'Hawaii White' Garden Ageratum Hawthorn
Hawthorn, Apple Hawthorn, Dotted
Hawthorn, Downy Hawthorn, Green 'Winter King'
Hawthorn, May Hawthorn, Southern 'Winter King'
Hawthorn, Washington Hay Fever Weed
Hay Scented Fern Hazelnut, American
Hazelnut: americana Heart Leaf Philodendron
Heart Leaf Philodendron: scandens 'Heart of Fire' Mountain Laurel
Heartleaf Foamflower (spp.) Heartleaf Foamflower 'Dark Eyes'
Heartleaf Foamflower 'Ink Blot' Heartleaf Foamflower 'Oakleaf'
Heartleaf Foamflower 'Pink Bouquet' Heartleaf Foamflower 'Winterglow'
'Heart's Desire' Mountain Laurel Heather, White
'Heatherbun' Atlantic White Cedar 'Heavenly Blue' Morning Glory: tricolor
'Heavy Metal' Switch Grass Hechtia
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 Nettle, White Hedge Nettle, Whitestem
Hedgehog Agave Hedgehog Cactus
'Hegedus (Good Vibrations® Gold)' Creeping Juniper Heimia