Hopseed Bush (spp.) Hoptree (spp.)
Hoptree Golden 'Horae Wilson' Norway Spruce
'Horizantalis' Prickly Tea Tree Horizontal Juniper (spp.)
Horizontal Juniper 'Alpina' Horizontal Juniper 'Bar Harbor'
Horizontal Juniper Blue Horizontal Juniper 'Blue Acres'
Horizontal Juniper 'Blue Chip' Horizontal Juniper 'Blue Mat'
Horizontal Juniper 'Blue Rug' Horizontal Juniper 'Douglasii'
Horizontal Juniper 'Dunvegan Blue' Horizontal Juniper 'Emerald Spreader'
Horizontal Juniper 'Hegedus (Good Vibrations® Gold)' Horizontal Juniper 'Hughes'
Horizontal Juniper 'Jade River' Horizontal Juniper 'Livida'
Horizontal Juniper 'Plumosa' Horizontal Juniper 'Plumosa Compacta'
Horizontal Juniper 'Plumosa Compacta Wilms' Horizontal Juniper 'Prince of Wales'
Horizontal Juniper 'Turqouise Spreader' Horizontal Juniper Variegated
'Horizontalis' Colorado Red Cedar 'Horizontalis' Natal Plum
'Horizontalis' Scotch Elm Hornbeam
Hornbeam Maple Hornbeam, American
Hornbeam, Common (spp.) Hornbeam, Common 'Fastigiata'
Hornbeam, Common Weeping Hornbeam, European (spp.)
Hornbeam, European 'Fastigiata' Hornbeam, European Weeping
Hornbeam, Japanese Hornbeam: caroliniana, American
Hornbeam: cordata Hornbeam: laxiflora
Horned Holly (spp.) Horned Holly 'Burfordii'
Horned Holly 'Burfordii Nana' Horned Holly 'Carissa'
Horned Holly 'Ospring' Horned Holly 'Rotunda'
Horned Maple 'Hornibrookii' Common Juniper
'Hornibrookii' Norway Spruce Horoeka
Horsechestnut, California (spp.) Horsechestnut, California 'Canyon Pink'
Horsechestnut, Common (spp.) Horsechestnut, Common 'Memmingeri'
Horsechestnut, Common 'Sterile Horsechestnut' Horsechestnut, Common 'Umbraculifera'
Horsechestnut, European (spp.) Horsechestnut, European 'Memmingeri'
Horsechestnut, European 'Sterile Horsechestnut' Horsechestnut, European 'Umbraculifera'
Horsechestnut, Indian (spp.) Horsechestnut, Indian 'Sydney Pearce'
Horsechestnut, Japanese Horsechestnut, Red (spp.)
Horsechestnut, Red 'Briotii' Horsechestnut, Red 'Rubro-petiolata'
Horsechestnut, Ruby Red (spp.) Horsechestnut, Ruby Red 'Briotii'
Horsechestnut, Ruby Red 'Rubro-petiolata' Horsetail Tree
Horsetail Tree, Gray 'Hortensis' Bracted Hydrangea
Houpu Magnolia 'Houston' Crapemyrtle: indica
'Hoveyi' American Arborvitae 'Howard' American Holly
'Howard' American Sycamore 'Howard McMinn' Sonoma Manzanita
Huangshan Magnolia Huckleberry, Blue
Huckleberry, Box Huckleberry, Californian
Huckleberry, Evergreen Huckleberry, Florist's
Huckleberry, Shot Huckleberry, Tree
'Hughes' Creeping Juniper Huisache
Huizache Humata
Humble Plant 'Humdinger' Rose
Hummingbird Bush 'Hummingbird' Summer Sweet
Hummingbird Trumpet Hungarian Lilac 'Royalty'