'King Arthur' Sweet Corn 'King Creole' Louisiana Iris
'King Edward' Yarrow 'King of Kings' Bromeliad: hybrid
King Protea 'King TutŪ' Egyptian Paper Reed
King's Spear (spp.) King's Spear: himalaicus
King's Spear: robustus 'Kingston Cardinal' Hellebore
'Kingswood Gold' Jewels Of Opar 'Kinkaku' Ginger Lily
'Kinkaku' Hosta: montana 'Kinshi' Japanese Tree Peony
Kirengeshoma: palmata 'Kiss Yellow' Treasure Flower
'Klaus Jelitto' Stokes' Aster Knapweed, John Coutts 'John Coutts'
Knautia (spp.) Knautia 'Jesse'
'Kneiffii' Goat's Beard Knight's Star Lily 'Ruby Meyer'
Knight's Star Lily 'Safari' 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 'Kobold' Spiked Blazing Star
Koeleria Grass 'Kohaku' Hybrid Toad Lily
'Kohlrabi' Savoy Cabbage Kokerboom Aloe
'Kong Rose' Coleus 'Kooriyama' Hosta: opipara
'Kopper King' Mallow Korean Angelica
Korean Bellflower Korean Chrysanthemum 'Clara Curtis'
Korean Mint 'Golden Jubilee' Korean Tassel Fern (spp.)
Korean Tassel Fern Variegated 'Kozuhara' Flamingo Flower
Kralalwyn Aloe 'Krossa Regal' Hosta
'Krugerand' Tall Bearded German Iris Kuma Bambaoo Grass
Kuro-Chiku (spp.) 'Kurt's Variegated' Hybrid Geranium
'Kwanso' Double Daylily Kweek 'Austrailia'
Kweek 'Santa Ana' 'KY31' Tall Fescue
'Kyoto' Vase Plant Kyushu Meadow Rue
'La Fresco' Cardinal Flower La Kwa 'Spindle'
Labrador Violet Lace Cactus
Lace Fern Lace-leaf Sundew
Lachenalia Lachenalia: orthopetala
Lachenalia: pallida 'Lacquer Leaf' Foamflower: Tiarella
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