When or if to top

short ryder seeds from nivarnia ,they re 14inches tall growin in a bubbler tote .theyre about 50 days into a 90 cycle and just got hairs this week .is it too late to top this plant.how much to cut

You can technically top at any time, its just not recommended during flower.

A week before going into flower is usually when most people do it.

short ryder is an auto isnt it? im sure autos do best when just left to grow, they have short lives so you dont wanna slow them down.

I second Tamjam69, I would not top an autoflower.