Achillea ageratum, also known as sweet yarrow, sweet-Nancy, or sweet maudlin, is a flowering plant in the sunflower family, native to southern Europe (Spain, Portugal, France, Italy, Greece, Balkans). It is cultivated in many places for its pleasant fragrance and sparingly naturalized in a few places outside its native range. Using only the above description and what you know about the world, "AChillea ageratum is sparingly used outside of native range due to heat." is definitely correct, incorrect, or inconclusive? 