Desert Zinnia. Zinnia acerosa, Sunflower Family: ( Asteraceae ) , Desert Zinnia. Also called: Wild Zinnia, Spinyleaf Zinnia, White 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 delightful, low-growing, small, perennial, which forms a tidy bouquet of white flowers! It's a native of Arizona that qualifies as a low water use plant. Be careful in Phoenix gardens. The worse thing you can do is to plant Desert Zinnia in heavy clay soils and overwater it. But if you have a well-drained bed, or live on rock, it's a perfect, no hassle addition. The white flowers are wonderful in the night when you're outside enjoying the garden. It will endure full sun or part shade, and gets about 10" tall. Group several for a more spectacular look. Looks fabulous next to rocks. They need moderate water in the summer. A small amount of water in the winter. Try not to overwater. Quick Notes: Height: Up to 10 inches tall. Spreads up to 3 feet wide. Flowers: 1 1/2" flower heads of 4 broad white rays surrounding a small yellow central disk. The flower heads are solitary and terminal on slender stalks. Flowering Time: Late March - November. Best in April. Leaves: Leaves are grayish green, opposite and narrowly linear to lanceolate. About 1-2 inches long. Found: Native of the USA (AZ, NM, TX, UT). Also found in Northern Mexico in northern Sonora, northern Chihuahua. Hardiness: USDA Zone 3a: to -39.9 �C (-40 �F) USDA Zone 3b: to -37.2 �C (-35 �F) 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) USDA Zone 9b: to -3.8 �C (25 �F) Soil pH requirements: 5.6 to 6.0 (acidic) 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) Sun Exposure: Full Sun Elevation: 2,300 to 6,200 feet. Habitat: Desert soil, rock, does well in loose soil on slopes. Miscellaneous: Excellent Xeriscape Landscaping Plant. Flowering Photos Taken October 11, 2006. Boyce Thompson Arboretum at 2,431 feet elevation.

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