Giant foxtail is a larger plant than green or yellow foxtail. Giant foxtail will not tolerate mowing and is rarely found in mowed turf areas. It is most commonly a weed of cultivated crops.
Giant foxtail is not often found in turf situations. It will not tolerate mowing and is therefore easily controlled but such measures.
The foxtails, in general, can be confused with crabgrass as seedlings. Giant foxtail (rarely in turf) is easily distinguished by conspicuous hairs on the upper leaf surface and sheath. Yellow foxtail lacks hairs on the sheath and is very sparsely hairy on the upper leaf surface but has long hairs at the base of the leaf. Green foxtail has sheaths with hairy margins but lacks hairs on the upper leaf surface.