Maturation

Maturity is the rate at which a person or creature grows from infancy to adulthood.

Mainstream Smurfs Media
In mainstream Smurfs media, a Smurf grows from infancy to adulthood in the span of 100 to 150 years, depending on the media universe. This is due to the power of the Long Life Stone, which controls the rate of aging for Smurfs, giving them longer life spans than humans.