Ironite is one fertilizer that bills itself as a "natural soil supplement . . . popular choice for home, lawn and garden for 43 years. Nothing greens like Ironite. Will not burn." Ironite is made from a 60 acre pile of mine tailings located at a Superfund-nominate site. Testing by state agencies in Washington and Minnesota in 1998 and 1999 found dangerously high levels of arsenic and lead.