Money doesn't grow on trees?

[Nga]

Test No. incompl/inter-15 "Popular Idioms (2) Garden", question 7

Money doesn't grow on ..........

(a) plants
(b) bulbs
(c) trees
(d) bushes

Test No. incompl/inter-15 "Popular Idioms (2) Garden", answer 7

Money doesn't grow on trees.

Correct answer: (c) trees

Your answer was: incorrect
Money doesn't grow on bushes.
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Hi, I don't understand this sentance. please explain to me. Thanks

[Torsten]

It means you have to give something in return for money. You have to earn money.

TOEIC listening, talks: A writer is answering interview questions

[Ft_Louie]

Dear Torsten,
I think this idiom is also used to tell somebody not to spend money carelessly because you don't have a lot of it. Is it right?

[Beeesneees]

You can use it for that purpose, yes.
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Cheers m' dears!