'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' 'Kozuhara' Flamingo Flower
Kralalwyn Aloe 'Kramers Rote' Darley Dale Heath
'Kramer's Supreme™' Japanese Camellia 'Krauter Vesuvius' Cherry Plum
'Krossa Regal' Hosta 'Krugerand' Tall Bearded German Iris
Kruse's Mallee 'Kudan' Trumpet Vine
Kukui Kuma Bambaoo Grass
Kumquat, Oval 'Kumsun' Korean Greenstem Forsythia
Kunzea, Scarlet Kunzea, Small Leaf 'Dwarf'
Kuro-Chiku (spp.) Kuro-Chiku 'Boryana'
Kurrajong, Rusty 'Kurt's Variegated' Hybrid Geranium
'Kurui jushi' Japanese Maple Kurume Azalea 'Coral Bells'
Kurume Azalea 'Hinodegire' Kurume Azalea 'Snow'
'Kwanso' Double Daylily 'Kwanzan' Oriental Cherry
Kweek 'Austrailia' Kweek 'Santa Ana'
'KY31' Tall Fescue 'Kyoto' Vase Plant
Kyushu Meadow Rue 'Kyushu' Panicle Hydrangea
'L.D. Braithwaite' Rose 'La France' Bigleaf Hydrangea
'La Fresco' Cardinal Flower 'La Gasneria' Common Honeysuckle
'La Jolla' Bougainvillea: Bougainvillea La Kwa 'Spindle'
'La Marne' Bigleaf Hydrangea 'La Marne' Rugose Rose
'La Reine Victoria' Rose 'La Seduisante' Hebe: hybrid
Labrador Tea 'Milky Way' Labrador Violet
Laburnum, Waterer (spp.) Laburnum, Waterer 'Vossii'
Lace Cactus Lace Copperleaf
Lace Fern 'Lace Parasol' Winged Elm
'Lace Towers' Birch Lacebark
Lacebark Elm (spp.) Lacebark Elm 'Allee™'
Lacebark Elm 'Bosque®' Lacebark Elm 'Drake'
Lacebark Elm 'Dynasty' Lacebark Elm 'Littleleaf'
Lacebark Elm 'Pygmaea' Lacebark Elm 'Sempervirens'
Lacebark Pine Lace-leaf Sundew
Lachenalia Lachenalia: orthopetala
Lachenalia: pallida 'Lacquer Leaf' Foamflower: Tiarella
Lacquer Tree, Chinese Lacquer Tree, Japanese
Lacuala Palm Ladder Fern (spp.)
Ladder Fern 'Bostoniensis' Ladder Fern 'Crispa'
Ladder Fern 'Dallas' Ladder Fern 'Fluffy Ruffles'
Ladder Fern Golden Ladder Fern 'Kimberly Queen'
Ladder Fern 'Portor's Rossevelt' Ladder Fern: spicant