William,

Most bucks are about finished growing their antlers by mid August.  However, antler growth patterns are about as individual as most juvenile growth patterns.  Some bucks show rapid antler growth early on, some bucks’ antlers grow at about the same rate throughout the growing season and some add a bunch of inches just before they shed their velvet.  A few bucks may add several inches this time of year, but most won’t add many inches from now until they shed velvet.

Growing Deer together,

Grant