hear the grass grow

absence makes the heart grow fonder

One feels more love or affection for those one loves when parted from them.

grass tops

Of, related to, or involving local influential figures.

green as grass

Inexperienced or naive.

grow a pair

To be brave; to show some courage, especially in a situation in which one has so far failed to do so.

grow a set

Synonym of grow a pair.

grow a tail

to be nearly about to defecate, to the point of being unable to completely hold it in

grow apart

To gradually become estranged.

grow cold

To wane; to lose interest or enthusiasm for something or someone; to become disenchanted or to fall out of love with someone.