Kafir Lily Kahili Ginger
'Kahlua' Hybrid Geranium Kalanchoe
Kalanchoe, Christmas Kalanchoe: manginii
Kalanchoe: rhombopilosa Kalanchoe: rosei seyrigii
Kale, Giant Kale, Sea
Kalimeris Kalimeris Golden
'Kalinda' Houseleek Kalwerbossie
Kamchatka Bugbane 'White Pearl' Kamschataka Sedum (spp.)
Kamschataka Sedum 'Tricolor' Kamschataka Sedum Variegated
Kamschataka Sedum: kamtschaticum ellacombianum Kamschataka Stonecrop (spp.)
Kamschataka Stonecrop 'Tricolor' Kamschataka Stonecrop Variegated
Kamschataka Stonecrop: kamtschaticum ellacombianum Kanab Yucca
Kangaroo Apple: laciniatum Kangaroo Paw (spp.)
Kangaroo Paw 'Red Cross' Kangaroo Paw, Evergreen (spp.)
Kangaroo Paw, Evergreen 'Red Cross' 'Kansas' Daylily
Kansas Gayfeather 'Karalee White' Gaura
'Karine' Oriental Poppy 'Karl Foerster' Feather Reed Grass
'Karmine' Spiderwort: hybrid Karoo Rose
'Kashmir Purple' Clarke's Geranium Kashmir Sage
'Katherine' Summer Phlox 'Katie Pink' Mexican Petunia
'Kelsae Sweet Giant' Onion 'Kelwayi' Golden Marguerite
'Ken Clifford' Spiderwort: hybrid Kencur
Kennedy's Buckwheat Kentucky Blue Grass
'Kentucky Colonel' Spearmint 'Kew Rose' Tree Lavatera
'Kewensis' Primrose: hybrid Keyflower (spp.)
Kiepersol 'Kimberly Queen' Boston Fern
'Kimono' Foamy Bells 'Kim's Knee High' Purple Coneflower
'Kim's Mophead' Purple Coneflower 'Kindly Light' Daylily
'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