Prairie Zinnia. Zinnia grandiflora Composite Family ( Compositae ) And Sunflower Family ( Asteracae ), Prairie Zinnia. Also known as: Wild Zinnia, Rocky Mountain Zinnia Little Golden Zinnia, Yellow Zinnia, Prairie Zinnia, Plains Zinnia. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. A subshrub having short leafy stems and numerous small flower heads with nearly round yellow-orange rays; ranges from Arizona south to Mexico and east to Kansas. Also considered a low water use (xeriscape) plant. Quick Notes: Height: Up To About 12 inches Tall and wide. Flowers: Yellow Ray flowers with red brown disk flowers. 1-1 1/2" wide; bracts overlap. Composed of 4 petals, orange anthers. Flowering Time: May - October. Leaves: 1 inch long, very narrow, opposite, with 3 veins at base. Found: Native throughout the American Southwest and the Sonoran deserts of Arizona and Mexico. Hardiness: USDA Zone 4a: to -34.4 �C (-30 �F) USDA Zone 4b: to -31.6 �C (-25 �F) USDA Zone 5a: to -28.8 �C (-20 �F) USDA Zone 5b: to -26.1 �C (-15 �F) USDA Zone 6a: to -23.3 �C (-10 �F) USDA Zone 6b: to -20.5 �C (-5 �F) USDA Zone 7a: to -17.7 �C (0 �F) USDA Zone 7b: to -14.9 �C (5 �F) USDA Zone 8a: to -12.2 �C (10 �F) USDA Zone 8b: to -9.4 �C (15 �F) USDA Zone 9a: to -6.6 �C (20 �F) Soil pH requirements: 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: Full Sun Elevation: 3,500 - 6,800 Feet. Habitat: Woodlands, grasslands, deserts. Miscellaneous: Flowering Photos Taken September 22, 2006 at Cherry Road, Arizona.

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