Oklahoma City, OK (Zone 7a) | November 2004 | negative
This plant is really a weed. It is native to the U.S. and grows in Southern AZ and perhaps other places as well. It can reach a height ...Read Moreof 24" in favorable conditions. The pollen that this plant produces is an allergen.
June,2010 - listed as unreliable to be killed by Round-Up in farmer's fields, per U of IL agronomist
This plant is really a weed. It is native to the U.S. and grows in Southern AZ and perhaps other places as well. It can reach a height ...Read More