False Oat - Arrhenatherum elatius.
(Elatius means tall)

A native of Europe, classed as fodder,  weed, or ornamental plant, it can grow to be 150cm tall.
As fodder it would be grown in a hay meadow as food for domesticated animals.

A common native, deep rooted perennial, very leafy and drought resistant, The stem is 2-3 feet high,  witha flower panicle, (cluster of flowers) over 6 to 12 inches.

Grows in nutruient rich soils.