From the article: "Once the plant absorbs a significant amount of metal, they can also be harvested for their commercially valuable contents, according to the

From the article: "Once the plant absorbs a significant amount of metal, they can also be harvested for their commercially valuable contents, according to the release." "nickel, zinc, copper and manganese in high concentrations" are all commercially viable metals worth collecting, assuming the extraction process is cheaper than digging it out of the ground. I haven't been able to find out how long the roots are, or how deep they typically grow