All the time - itโs just the way it is with autos. 8-9 week seed to harvest is frankly the rarity..
Iโm an advocate for photoperiods. With an awesome set up like yours.. an 8 week flowerer with 4 weeks of veg time is the same amount of time to harvest as most autos actually end up. Give one a try if you havenโt already and Iโd bet ya you wonโt look back.
Autoflowers are combing ruderalis, Indica, and sativa (assuming itโs any type of hybrid which 95% if strains now are) .. itโs just more variation and genetic instability than regular photoperiods have and thereโs still plenty with those.
Anyways.. when you run a larger grow like this thereโs no way to control your timeline or schedule cuz you canโt clone em and therefore youโll have wild variations between the several plants.
Looking good tho! Keep it up and give photos a run sometime ๐