Berryrider cream caramel, trans siberian new grow

Hey all starting a new grow today heres the set up with plenty of pics to follow.grolabs 120 4x4x6 grow tentsix inch carbon filter 8 inch exhaust fan 300 cfm3 150 watt hps lamps Started germination of three strains from the attitude all auto flowers barneys farm cream caramel fem,auto seeds berry rider, and auto seeds trans siberian.all in 5 gal square pots in fox farm ocean forrest soil fox farm nutes. seeds cracked last night so i got started today as soon as i got work. only started 3 seeds for now going to follow with 3 more in about 3 weeks and 3 more and so on. i can fit about 20 plants in 5 gal pots with pleanty of room to work. i have had several successful grows a few years back but havent done any growing for the pase three years or so. and i am sure i have forgotten a few things so any good imput is apreciated i am going to try to update at least once or twice a week for now and prob several days a week when farther in to the grow cycle. this is also my first autoflower grow. and i am not to sure on feeding just going to take it easy. i am posting pleanty of pics with this journey again any help especially in regards to feeding. I have three weeks or so to come up with a plan.