My gorilla glue in this run didnt start to flower till day 46 but I transplanted it and started it in a small coffee cup for like 23 days or so. So it will end up going around 110 days. Im going to guess and say that if yours took till day 90 to autoflower that their was some outside stresses on the plant that caused it to stall out IE changing light cycles over or under fertilization or watering some kind of shock to its roots changing its enviornment its usually something we people do to the plants that messes em up n ive definetly done my fair share of messing up my grows marijuana is very tempermental and u would think its a weed but no its a very fussy weed that demands love and attention to grow at full potential. I have killed hundreds of plants over the 20 years ive been growing and have made so many mistakes that I have a very good understanding of how I need to grow to get the results I want. Its not the good grows that define you as a gardener its bouncing back from the bad grows and learning from them that makes you a good grower in my opinion anyways.