Arizona Lupine. Lupinus arizonicus, Legume Family: ( Fabaceae ), Arizona Lupine. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. Quick Notes: Height: Up To 4 to 18 inches. Flowers: Red - Purple to Light Pink - Purple. Pea-like flowers about 1/4 inch long in very elongated clusters. The banner petal has a red - spotted yellow and white banner spot that becomes magenta with age. Produced 20�50 or more on a tall spike. Flowering Time: March - May. Leaves: Green, hairy, and palmately compound with 6�10 leaflets, each leaflet 1/2 to 1 3/4 inches long and 1/4 to 1/2 inches broad, on a 1/2 to 3 inch long petiole. Found: Mojave Desert of California and Arizona. The USDA claims it is native of the USA (AZ, CA, NV). Hardiness: USDA Zone 9a: to -6.6 �C (20 �F) USDA Zone 9b: to -3.8 �C (25 �F) USDA Zone 10a: to -1.1 �C (30 �F) USDA Zone 10b: to 1.7 �C (35 �F) USDA Zone 11: above 4.5 �C (40 �F) Soil pH requirements: 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline) 7.9 to 8.5 (alkaline) 8.6 to 9.0 (strongly alkaline) Sun Exposure: Sun to Partial Shade Elevation: 0 - 3,200 feet. Habitat: Sandy desert soils, hot, sunny areas, good drainage, roadways, sandy or gravelly areas. Miscellaneous: Great Xeriscape plant. Easy to see on the Joshua Tree Forest Parkway, a few miles northwest of Wickenburg, Arizona. BTW. it has more Joshua Trees to see than the nationsl park in California.

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