Knotweed
Persicaria virginiana
Native to eastern North America, east Asia. To 2–4 ft. tall, spreading indefinitely by creeping ...
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Knotweed
Persicaria bistorta
Native to Eurasia. Makes aclump to 2 1/2 ft. high and 3 ft.wide, with large leaves. Tight,2–3-in. spik...
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Koa
Acacia koa
Native Hawaiian tree grows 60 ft. tall and wide and produces a beautiful hardwood. Leaves are feathery...
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Kohlrabi
Kohlrabi
Cool-season cabbage relative. Leaves and leafstalks are edible, but edible part most commonly associat...
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Korean Fir
Abies koreana
Native to Korea. Grows slowly to 30 ft. tall, 20 ft. wide, often much less. The white backs of the nee...
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Korean Grass
Zoysia tenuifolia
Creeping, fine textured, bumpy. Grows 3- to 6- high unmowed. Makes a beautiful grassy meadow or gives ...
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Kousa Dogwood
Cornus kousa
Native to Japan and Korea. Can be a big multistemmed shrub or—with training—a small tree t...
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Kukui
Aleurites moluccana
Native to Polynesia and southern Asia; has naturalized in Hawaii, where it has been designated the sta...
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Kumson Korean Greenstem Forsythia
Forsythia viridissima koreana
Grows 6 ft. tall, 5 ft. wide, with silver-veined, dark-green leaves. Yellow flowers appear on purple b...
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Kurume Azalea
Rhododendron x obtusum (Azalea hybrid - Kurume)
This is a naturally occurring hybrid between R. kiusianum and R. kaempferi
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Kurume Hybrid Azalea
Rhododendron x obtusum (Azalea hybrid - Kurume)
These are naturally occurring hybrids between R. kiusianum and R. kaempferi. Compact...
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