Sahara Mustard. Brassica tournefortii, Mustard Family: ( Cruciferae ) formerly, ( Brassicaceae ), Sahara Mustard. Also Called: Asian Mustard, African Mustard, Moroccan mustard, Desert Mustard, Southwestern Mustard, Mediterranean Mustard, Mediterranean Turnip, Wild Turnip, Prickly Turnip, and Turnip Weed. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. Sahara Mustard is native to many areas of the Old World from north Africa and from the Middle East east to southern Europe and Pakistan. It is probably the most dangerous invasive weed that has entered the United States. Sahara mustard is taking over the Desert Southwest at low and mid elevations from southeastern California to southern Nevada and South into the states of Baja California and Sonora. It favors sandy, disturbed soils at low elevations, but its range is expanding rapidly into undisturbed soils including rocky hillsides in Arizona Upland. Quick Notes: Height: Up to about 36 inches. Spreading out to about 24 inches wide. Flowers: Flowers occur in a cluster on top of long green stem. They are yellow to about 1/8" long with 4 petals. Flower Stalk: The flower stalk is about 18" - 30" long, smooth, and dark green. Flowering Time: Mid December - May. Seed Pods: Up to 2" long, slender, seed pods. Leaves: The basal rosette of divided hairy leaves can span three feet. Found: Native to the deserts of North Africa and the Middle East. 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: Full Sun Sun to Partial Shade Light Shade Elevation: 0 - 2,600 Feet. Habitat: Alkaline, well-drained/light soils. Washes in the desert environs, Irrigated fields, moist fallow fields, roadsides. Found throughout lower elevations in Arizona. Miscellaneous: Flowering Photos Taken March 21, 2003. Glendale, Arizona.

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