All the time - itβs just the way it is with autos. 8-9 week seed to harvest is frankly the rarity..
Iβm 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 havenβt already and Iβd bet ya you wonβt look back.
Autoflowers are combing ruderalis, Indica, and sativa (assuming itβs any type of hybrid which 95% if strains now are) .. itβs just more variation and genetic instability than regular photoperiods have and thereβs still plenty with those.
Anyways.. when you run a larger grow like this thereβs no way to control your timeline or schedule cuz you canβt clone em and therefore youβll have wild variations between the several plants.
Looking good tho! Keep it up and give photos a run sometime π