mow, unmown, new-mown hay, lawnmower. Unmown grass at the site has already grown knee high.

The complex opened in 2017 with robots and other equipment to make gasoline-powered cars. Hyundai sold the campus late last year for a fraction of the $1.1 billion it took to build and equip it. Unmown grass at the site has already grown knee high.

AP Last week, Google brought in a herd of goats to mow the grass on its Mountain View, Calif. headquarters rather than using lawnmowers. ...

unmown

/ʌnˈməʊn/

adjective

1. not mown.

   "unmown grass"

mow Show phonetics
verb [I or T] mowed, mown or mowed
to cut plants, such as grass or wheat, which have long thin stems and grow close together:
You can't mow the grass/lawn if it's wet.
I love the smell of new-mown hay.

mower Show phonetics
noun [C]
a machine for cutting especially grass
See also lawnmower.