What age does a bichon frise stop growing?

Bichons need to be washed and dried with a towel then blow dried. Then they should be brushed. or else they can be looking mangy. my bichon i wash towel dry air dry blow dry then brush. But if you dont want to you can jsut bring it to a dog groomer or pet store and they could do it. I do mine myself and it usually take 45 minutes.