He has never been one to 'let the grass grow under his feet'. [=he has never been slow about doing things; he gets things done quickly]
The young candidate hoped to gather votes at the 'grassroots' level in his own neighborhood.
I'm not ready to be 'put out to grass' [='put out to pasture'] just yet.
(..) I like these calm little moments before the storm. It reminds me of Beethoven. Can you hear it? It's like when you put your head to the grass... you can hear it growing. You can hear the insects. - Do you like Beethoven? - Couldn't really say. I'm gonna play you some. (..)1994 Léon: The Professional