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.
(..) ...they can still surprise you. Get down. Confound it all,Samwise Gamgee! Have you been eavesdropping? I haven't been dropping no eaves. Honest. I was cutting the grass under the window. A little late for trimming the verge,don't you think? -I heard raised voices. -What did you hear? Speak! (..)2001 The Lord of the Rings: The Fellowship of the Ring