First time grow. learning a lot while doing. bought a 54w led bulb that i thought was enough until i learned it definetly was not enough light. Growing in a 60x60x140cm tent in plagron growmix soil. Its prefertilized so i am not going to give my biobiz nutes until beginning of week 4. (or signs of "hunger") I am really open to suggestions as I am here to learn :)
Yellowing is potentially from lack of nitrogen. Since itβs week 2 and your plant looks pretty good, I would suggest start giving light nutrients. Start with 1/4 recommended dose. Leaves are also beginning to curl and your temperature is 81. I would throw in some b52 to better manage temperature stress and beneficial microbes. Good luck man. So far looking good though!