Blue Elderberry
Sambucus nigra caerulea
Native from California north toBritish Columbia, east to theRockies. To 10–30 ft. tall, 8–20 ft. wide....
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Blue False Indigo
Baptisia australis
Grows to 3–6 ft. tall, 4 ft. wide, with deep blue flowers.
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Blue flag
Iris versicolor
Looks something like Siberian iris, with 1 1/2- to 4-ft., grassy foliage; narrow leaves are thicker in...
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Blue Flax
Linum lewisii
Native to western NorthAmerica. Upright, 3 ft. high, with abundant sky blue flowers.Does best at highe...
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Blue Grama Grass
Bouteloua gracilis
This native bunch grass grows up to 1 1/2 to 2 ft. high, 1 ft. wide. Flowering stems have odd inflores...
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Blue Hibiscus
Alyogyne huegelii
Australian native hardy to about 23°F/°5°C. Upright grower, to 5°8 ft. tall and wi...
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Blue Lyme Grass
Leymus arenarius
From coastal northern and western Europe. Low, vigorous clump of gray-blue leaves topped by clusters o...
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Blue Marguerite
Felicia amelloides
Woody perennial in listed zones; summer annual elsewhere. Despite the common name, this is not the tru...
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BLUE OAK
Quercus douglasii
Native to dry foothillsaround California’s Central Valley and interior valleys of Southern California....
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Blue Oat Grass
Helictotrichon sempervirens
Native to western Mediterranean region. Bright blue-gray, narrow leaves in fountainlike clump 2–...
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Blue Palo Verde
Cercidium floridum
Native to deserts of Southern California, Arizona, Baja California. In gardens, grows fast to 35 ft. t...
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Blue Palo Verde
Parkinsonia floridum
Native to the deserts of Southern California, Arizona, and Baja California. In gardens, it grows fast ...
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