'Kiyo sumi' Japanese Maple 'Kiyohime' Japanese Maple
'Kiyosumi' Sawtooth Hydrangea 'Klaus Jelitto' Stokes' Aster
'Kleims Hardy' Gardenia 'Klein #1' American Holly
'Kleinburg' White Ash Klinki Pine
Knapweed, John Coutts 'John Coutts' Knautia (spp.)
Knautia 'Jesse' 'Kneiffii' Goat's Beard
Knife Acacia Knifeleaf Wattle
Knight's Star Lily 'Ruby Meyer' Knight's Star Lily 'Safari'
Knobthorn Acacia 'Knock Out®' Rose
Knotted Marjoram 'Compactum' Knotted Marjoram 'Sicillian'
Knotweed (spp.) Knotweed 'Border Jewel'
Knotweed, Chinese Knotweed, Climbing
Knotweed, Flowery Knotweed, Japanese (spp.)
Knotweed, Japanese 'Compactum' Knotweed, Japanese 'Crimson Beauty'
Knotweed, Japanese Variegated Knotweed, Lesser
Knotweed: amplexicaule (spp.) Knotweed: amplexicaule 'Speciosa (Firetail)'
Knotweed: amplexicaule 'Taurus' Knotweed: capitatum
Knotweed: emodi Knotweed: polymorphum
Knotweed: virginianum (spp.) Knotweed: virginianum 'Compton's Form'
Knotweed: virginianum 'Lance Corporal' Knotweed: virginianum Variegated
'Knowles Ryerson' Ceanothus: hybrid 'Kobold' Japanese Barberry
'Kobold' Spiked Blazing Star Kobus Magnolia (spp.)
Koehne Holly 'Wirt L.Winn' Koeleria Grass
'Kogane nishiki' Japanese Maple 'Kohaku' Hybrid Toad Lily
'Kohlrabi' Savoy Cabbage Kohuhu 'Irene Paterson'
Kohuhu, Kirk's 'Kojo No Mai' Cherry
'Kojo- no-mai' Fuji Cherry Kokerboom Aloe
'Kokyo' Japanese Maple Kolkol
'Kolmbeau (Mystical™ Beauty)' St. Johnswort: Hypericum 'Komachi hime' Japanese Maple
'Kong Rose' Coleus 'Kooriyama' Hosta: opipara
Koorsboom 'Kopper King' Mallow
Korean Abelialeaf Korean Angelica
Korean Arborvitae Korean Azalea 'Compacta'
Korean Barberry Korean Bellflower
Korean Chrysanthemum 'Clara Curtis' 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 Mint 'Golden Jubilee'
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
Korean Tassel Fern (spp.) Korean Tassel Fern Variegated
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