expression, godan verb (-tsu)
nature itself is a good mother; even without parents, children grow up
Proverb meaning children will grow up even without parental care; often used to reassure or to note that nature provides.
親はなくとも子は育つというから、あまり心配しなくても大丈夫だよ。
They say 'even without parents, children grow up,' so you don't need to worry too much.
A traditional Japanese proverb. The exact origin is uncertain, but it reflects a common folk wisdom about the resilience of children.