Californian thistle is also well-adapted to growing in situations such as asparagus crops and in orchards where residual herbicides are used. Residual herbicides remain active in the soil for several ...
Nodding thistle is a biennial weed, typically establishing in autumn in pastures that have been damaged by drought over summer. In autumn with the first substantial rainfalls, as there is bare soil, ...
Canada thistle differs from other species of the true thistle in that there are male and female flower heads, and these are on separate plants. By asexual reproduction, it is possible that a colony of ...
Milk thistle has been used for its purported medicinal properties for thousands of years, but its supplement form didn't explode until recently. Milk thistle supplement sales in the U.S. reached $ ...