Wolfberry. Lycium fremontii, Nightshade Family: ( Solanaceae ), Wolfberry. Also Called: Fremont's Thornbush, Fremont's Desert - Thorn, Christmas Berry. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. A decidious Shrub. With edible fruit. Enjoyed by birds. An excellent Xeriscape plant. Quick Notes: Height: Up to 9 feet tall. 3 to 9 feet spread. Usually about 5 foot tall and 6 foot wide. Flowers: Monoecious; narrow tubular, 5 lobed, 1/2 inch long, lavender to purple, appearing in primarily late winter to early spring, some throughout the year. Flowering Time: Late February - Early March. Fruit: Fleshy, juicy, orange-red, oval berries (resemble small tomatoes), 1/2 to 3/8 inch long, hang downward, ripen in spring, edible. Leaves: Alternate, simple, drought deciduous, 1/4 to 1/2 inch long, broadly obovate to spatulate, entire margins, blue to gray-green, somewhat thickened or even succulent. Found: The USDA claims it is native to the USA (AZ, CA). It is native in Arizona to Mohave, Gila, Maricopa, & Pinal counties. It is also native to northwestern Sonora, & Baja California Norte, Mexico. Hardiness: 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: Full Sun Elevation: Normally found below 3,000 feet, but has naturally been found between 0 to 6,355 feet in some rare instances. Habitat: It takes low water, full sun, It often grows in areas with alkaline soils, such as alkali flats, and well draining soil. Miscellaneous: Flowering Photos Taken Desert Botanical Garden Phoenix Arizona, February 27, 2008 & March 27, 2008.