Growing Medium. It tolerates heavy foot traffic and compacted soil which means that it quickly colonizes in any lawn that sees a lot of hard family use. The scientists concluded the ones with the toughest seed coats Palmer amaranth, waterhemp and lambsquarter could survive long enough to travel up to 1,800 miles once they d boarded their birds.  Source: [url=https://www.micromentor.org/question/17447]https://www.micromentor.org/question/17447[/url]