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Introduced from North America. Requires higher temperatures to germinate, spring/summer. Very important grass-weed in tropical and sub-tropical crops also found in temperate zones.


Young plants have reddish/brown stripes at the base of the leaf. Tuft forming plants up to 120 cm in height. The panicles are up to 20 cm in length with spiky dense racemes with bristly hairs and long or short awns.

Ligule: Absent

Auricles: Absent

Leaf blade: Dark grey/green, hairless

Barnyard grass - young Barnyard grass young plant.
Barnyard grass - mature Barnyard grass mature plant.


Barnyard grass 3 Barnyard grass flower head.

Identify grass-weeds

You can use this page to help identify the grass-weeds in your crops, and then find out about the best crop protection products to control them.

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