Summer annuals like prostrate knotweed and crabgrass are turning orange and dying, leaving behind bare soil on fields.Knotweed going dormantOctober 15, 2009 Summer annuals like prostrate knotweed and crabgrass are turning orange and dying, leaving behind bare soil on fields. Read the rest here Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Tumblr (Opens in new window)