80-120 days is normal and they contuine to grow up the last 3 weeks or there abouts before they settle down finish flowering and pack on the weight. Kick in some low side lighting and that will help.

You are doing fine, just remember any strain you grow will contuine to grow taller right up to the the last cycle in the plants life. About 3 weeks before peek harvest the plant changes to the finish flower cycle and packs on the trichomes and weight. (that's the quick version,heheh)