don't let the grass grow under (one's) feet

don't let the grass grow under (one's) feet

Be continually active; do not stand still or be idle (thus giving the grass a chance to grow where you're standing). Don't let the grass grow under your feet, kid. Get to work!
See also: feet, grass, grow, let
Farlex Dictionary of Idioms.

don't let the grass grow under one's feet

Act now, don't delay. For example, Write your applications today; don't let the grass grow under your feet. This expression alludes to waiting so long that grass can grow. [c. 1600]
See also: feet, grass, grow, let
The American Heritage® Dictionary of Idioms by Christine Ammer.

don't let the grass grow under your feet

Act with dispatch; don’t delay. This expression dates from the sixteenth century. It appeared in print in 1607 in Edward Topsell’s natural history, Foure-Footed Beasts (“The hare . . . leaps away again, and letteth no grass grow under his feet”).
See also: feet, grass, grow, let
The Dictionary of Clichés by Christine Ammer
See also:
  • don't let the grass grow under one's feet
  • don't let the grass grow under your feet
  • get on (one's) feet
  • get on feet
  • get to (one's) feet
  • get to feet
  • get to one's feet
  • balls of feet
  • balls of the/(one's) feet
  • regain (one's) feet