Also called cockspurgrass or watergrass, this annual has upright, reddish purple stems that grow 1 to 4 feet tall. When mowed in lawns, the stems grow close to the ground. The large, smooth leaves are 1/4 to 1/2 inch wide. One plant may produce as many as a million seeds from July to September. The seeds fall to the soil, remain dormant over the winter, and sprout the following year in early summer. Barnyardgrass is a troublesome weed from mid-summer to mid-fall. It thrives in lawns, gardens, and unplanted areas with rich, moist soil.
Barnyardgrass is not usually a problem in lawns unless turf is weak, with open patches. Plants can be hand-pulled.
©2002-2012 The Scotts Company LLC, all rights reserved.
® and ™ denote trademarks owned by or licensed to The Scotts Company LLC, its affiliates, or partners.
The Global Professional business group and its subsidiaries of The Scotts Company LLC were purchased by ICL in February 2011. This is the USA consumer products site forThe Scotts Company LLC. For information about ICL or Scotts® Professional products, please visit http://www.scottsprofessional.com.