Knife Acacia Knifeleaf Wattle
Knobthorn Acacia 'Knock Out®' Rose
'Knowles Ryerson' Ceanothus: hybrid 'Kobold' Japanese Barberry
Kobus Magnolia (spp.) Koehne Holly 'Wirt L.Winn'
'Kogane nishiki' Japanese Maple Kohuhu 'Irene Paterson'
Kohuhu, Kirk's 'Kojo No Mai' Cherry
'Kojo- no-mai' Fuji Cherry 'Kokyo' Japanese Maple
Kolkol 'Kolmbeau (Mystical™ Beauty)' St. Johnswort: Hypericum
'Komachi hime' Japanese Maple Koorsboom
Korean Abelialeaf Korean Arborvitae
Korean Azalea 'Compacta' Korean Barberry
Korean Early Lilac (spp.) Korean Early Lilac 'Cheyenne'
Korean Fir (spp.) Korean Fir 'Compact Dwarf'
Korean Fir 'Prostrate Beauty' Korean Fir 'Silberlocke'
'Korean Gold' Japanese Plum Yew Korean Greenstem Forsythia 'Bandel'
Korean Greenstem Forsythia 'Kumsun' Korean Greenstem Forsythia 'Seoul Gold'
Korean Greenstem Forsythia 'Suwan Gold' Korean Lilac 'Miss Kim'
Korean Littleleaf Boxwood (spp.) Korean Littleleaf Boxwood 'Wedding Ring®'
Korean Mountain Ash Korean Mountain Magnolia
Korean Pine (spp.) Korean Pine 'Morris Blue'
Korean Spirea (spp.) Korean Spirea 'Pink Parasols®'
Korean Stewartia Korean Sweetheart Tree
Koreanspice Viburnum (spp.) Koreanspice Viburnum 'Aurora'
Koreanspice Viburnum 'Compactum' Koreanspice Viburnum 'SMVCB (Spice Baby™)'
Koreanspice Viburnum 'Spiro (Spice Girl®)' Koreanspice Viburnum Variegated
'Koreanum' Japanese Maple 'Koshibori nishiki' Japanese Maple
'Koshimino' Japanese Maple 'Koster' Colorado Spruce
'Kosteri' Eastern Red Cedar 'Kosteri' Hinoki False Cypress
'Koto maru' Japanese Maple 'Kotohime' Japanese Maple
Kousa Dogwood (spp.) Kousa Dogwood 'Avalanche'
Kousa Dogwood 'Elizabeth Lustgarten' Kousa Dogwood 'Gold Star'
Kousa Dogwood 'Milky Way' Kousa Dogwood 'Miss Satomi'
Kousa Dogwood 'Square Dance' Kousa Dogwood 'Sunsplash'
Kousa Dogwood 'White Dusted' Kousa Dogwood 'Wolf Eyes'
'Kramers Rote' Darley Dale Heath 'Kramer's Supreme™' Japanese Camellia
'Krauter Vesuvius' Cherry Plum Kruse's Mallee
'Kudan' Trumpet Vine Kukui
Kumquat, Oval 'Kumsun' Korean Greenstem Forsythia
Kunzea, Scarlet Kunzea, Small Leaf 'Dwarf'
Kuro-Chiku 'Boryana' Kurrajong, Rusty
'Kurui jushi' Japanese Maple Kurume Azalea 'Coral Bells'
Kurume Azalea 'Hinodegire' Kurume Azalea 'Snow'
'Kwanzan' Oriental Cherry 'Kyushu' Panicle Hydrangea
'L.D. Braithwaite' Rose 'La France' Bigleaf Hydrangea
'La Gasneria' Common Honeysuckle 'La Jolla' Bougainvillea: Bougainvillea
'La Marne' Bigleaf Hydrangea 'La Marne' Rugose Rose
'La Reine Victoria' Rose 'La Seduisante' Hebe: hybrid
Labrador Tea 'Milky Way' Laburnum, Waterer (spp.)
Laburnum, Waterer 'Vossii'