Russian Thistle is a common weed throughout the Southwest. It is not native to Arizona and is found in areas where the natural desert has been disturbed such as vacant fields, roadsides, and agricultural areas. It is commonly known as Tumbleweed. Like many allergenic weeks, it distributes it’s pollen in the wind rather than relying on insects or birds and as a result is a major contributor to fall allergy and asthma symptoms in Phoenix.
Pollinates: May through November.