Gorilla Glue Flowering Stages To induce flowering in Gorilla Glue #4 (or any other photoperiod strain) you need to reprogram your timer to 12 hrs of light and 12 hrs of darkness ( 12/12 ). Some growers start counting flowering time from the day they flip the switch but bear in mind that the budding doesn't start right away. Gorilla Glue Auto Flowering Stages The next and final stage of this Gorilla Glue Autoflower indoor grow wasn't especially short but quite trouble-free. Well, apart from the accidental topping in the very first week of flowering. Week 6: The Main Top Gone for Good The main cola snapped and bandaged but eventually removed.