Gromwell, Purple 'Heavenly Blue' Gromwell, Purple 'Picos'
Ground Elder (spp.) Groundsel Bush: nummerifolia
'Harbor Belle™' Heavenly Bamboo 'Harbor Dwarf' Heavenly Bamboo
'Harlequin' Wintercreeper Heath, Cape 'Kramers Rote'
Heath, Cape 'Silberschmelze' Heath, Darley Dale 'Kramers Rote'
Heath, Darley Dale 'Silberschmelze' Heath, Molten Silver 'Kramers Rote'
Heath, Molten Silver 'Silberschmelze' Heath, Scotch 'Sherwood Creeping'
Heath, Spring 'Sherwood Creeping' Heath, Winter 'Sherwood Creeping'
Heath: darleyensishybrid, Winter 'Kramers Rote' Heath: darleyensishybrid, Winter 'Silberschmelze'
Heather 'Kramers Rote' Heather 'Silberschmelze'
Heather, White Heavenly Bamboo Dwarf
Heavenly Bamboo 'Firepower' Heavenly Bamboo 'Harbor Belle™'
Heavenly Bamboo 'Harbor Dwarf' Heavenly Bamboo 'Nana Purpurea'
Heavenly Bamboo 'Okame' Heavenly Bamboo 'Wood's Red'
'Heavenly Blue' Purple Gromwell Hebe Dwarf
Hebe 'Quicksilver' Hebe (spp.)
Hebe Variegated Hebe 'Godefrovana'
Hebe 'Pagei' Hebe 'Sutherlandii'
Hebe: amplexicaulis Hebe: epacridea
Hebe: franciscanahybrid 'Blue Gem' Hebe: franciscanahybrid 'Lobelioides'
Hebe: glaucophylla Hebe: haastii
Hebe: hybrid 'Edinensis' Hebe: hybrid 'Margret'
Hebe: hybrid 'Red Edge' Hebe: propinqua
Hebe: rakaiensis Hebe: recurva
Hebe: topiaria 'Hegedus (Good Vibrations® Gold)' Creeping Juniper
'Helleri' Japanese Holly 'Hemisphaerica' Common Juniper
'Hessei' Cotoneaster: hybrid 'Hillside Creeper' Scots Pine
Hog Cranberry (spp.) Hog Cranberry 'Massachusetts'
Hog Cranberry 'Microphylla' Hog Cranberry 'Point Reyes'
Hog Cranberry 'Radiant' Holly Grape, Oregon 'Apollo'
Holly Grevillea Holly, Box Leaved 'Helleri'
Holly, Box Leaved 'Kingsville Green Cushion' Holly, Box Leaved 'Red Lion'
Holly, Dwarf Holly, Japanese 'Helleri'
Holly, Japanese 'Kingsville Green Cushion' Holly, Japanese 'Red Lion'
Holly, Miniature Holly, Oregon 'Apollo'
Holly, Singapore Honeysuckle, Bush
Honeysuckle, Bush 'Butterfly' Honeysuckle, Etruscan
Honeysuckle, Georgia Bush 'Summer Stars™' Honeysuckle, Southern Bush 'Butterfly'
'Horae Wilson' Norway Spruce Horizontal Juniper (spp.)
Horizontal Juniper 'Alpina' Horizontal Juniper 'Bar Harbor'
Horizontal Juniper Blue Horizontal Juniper 'Blue Acres'
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 'Hughes' Creeping Juniper