In “doesn’t grow on trees” (or a tree name), something is not free, unlimited, or easy to get.; if sb / sth grows on you, you start to like them or it more and more
Editorial62% of films
In “doesn’t grow on trees” (or a tree name), something is not free, unlimited, or easy to get.
Money don't grow on trees.
Oxford23% of films
if sb / sth grows on you, you start to like them or it more and more
The forms grow on you.
Definitions from the Oxford Advanced Learner's Dictionary, 9th edition