Depends on the individual rooster. Some BYC members have had roosters crow at less than a week old. Yes, a week! Other roosters that didn't crow till they were nearing a year old.
My one roo crowed at 10 weeks; the other at 15 weeks. Both same breed.
What Makes A Roozter Stop Crowing. When I Got Him He Was Crowing But After 2 Monts He Just Quit. Any Answers. AND ALL ADVISE IS WELL WELCOME CAUSE I'M NEW TO ALL OF THIS