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.
(..) It's rumored to smell differently to each person according to what attracts them. For example, I smell... Freshly mown grass and new parchment and... Spearmint toothpaste. Now Amortentia doesn't create actual love. That would be impossible, (..)2009 Harry Potter and the Half-Blood Prince