Hemlock, Canadian (spp.) Hemlock, Canadian 'Bennett'
Hemlock, Canadian 'Coles Prostrate' Hemlock, Canadian 'Frosty'
Hemlock, Canadian 'Lewisii' Hemlock, Canadian 'Macrophylla'
Hemlock, Canadian 'Sargentii' Hemlock, Canadian Weeping
Hemlock, Carolina Hemlock, Eastern (spp.)
Hemlock, Eastern 'Bennett' Hemlock, Eastern 'Coles Prostrate'
Hemlock, Eastern 'Frosty' Hemlock, Eastern 'Lewisii'
Hemlock, Eastern 'Macrophylla' Hemlock, Eastern 'Sargentii'
Hemlock, Eastern Weeping Hemlock, Himalayan
Hemlock, Mountain Hemlock, Western
'Henryi' Anglojapanese Yew Hiba Arborvitae
'Hibernica' Common Juniper 'Hicksii' Anglojapanese Yew
'Hillside Creeper' Scots Pine 'Hillspire' Eastern Red Cedar
Himalayan Cypress Himalayan Hemlock
Himalayan Pine 'Hino' Japanese Cedar
Hinoki False Cypress (spp.) Hinoki False Cypress 'Coralliformis'
Hinoki False Cypress 'Crippsii' Hinoki False Cypress Dwarf
Hinoki False Cypress 'Elmwood Gold' Hinoki False Cypress 'Fernspray Gold'
Hinoki False Cypress 'Flabelliformis' Hinoki False Cypress Golden
Hinoki False Cypress 'Gracilis' Hinoki False Cypress 'Juniperioides Aurea'
Hinoki False Cypress 'Kosteri' Hinoki False Cypress 'Mariesii'
Hinoki False Cypress 'Nana Aurea' Hinoki False Cypress 'Nana Gracilis'
Hinoki False Cypress 'Nana Lutea' Hinoki False Cypress 'Nana Tonia'
Hinoki False Cypress 'Reis Dwarf' Hinoki False Cypress 'Rigid Dwarf'
Hinoki False Cypress 'Sanderi' Hinoki False Cypress 'Spiralis Aurea'
Hinoki False Cypress 'Split Rock' Hinoki False Cypress 'Tetracona Aurea'
Hinoki False Cypress 'Torulosa' 'Hollywood' Chinese Juniper
'Holmes Silver' Colorado Red Cedar 'Hoopsii' Colorado Spruce
'Horae Wilson' Norway Spruce 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 'Hornibrookii' Common Juniper
'Hornibrookii' Norway Spruce 'Hoveyi' American Arborvitae
'Hughes' Creeping Juniper Huon Pine
'Idyllwild' Eastern Red Cedar Imodi Pine
Incense Cedar (spp.) Incense Cedar 'Douglasii Pyramidalis'
Incense Cedar 'Emerald' Incense Cedar 'Excelsa'
Incense Cedar 'Fastigiata' Incense Cedar 'Zebrina'
'Intermedia' Japanese Yew: cuspidata 'Intertexta' Lawson's Cypress
'Iowa' Chinese Juniper 'Iseli Fastigiata' Colorado Spruce
'Iseli Foxtail' Colorado Spruce