Money doesn’t grow on trees, We are told. In fact, most things do not grow on trees, including Cement Mixers.
Bark, and leaves, and fruit grow on trees, much of them edible. Bees and monkeys and squirrels and other critters live in trees, but that is not quite the same thing.
As Cement Mixers do not grow on trees, YIR suggests We all take them a little more seriously when We encounter one.