Yellowing leef and rusty spots

When the plant is lighter in color and has lower yellowing leaves it usually means you are dealing with a nitrogen deficiency. Also with the splotchy parts that is bit of a pk deficiency so I’d up your nutrients a little bit more than you have and see how she responds!

hi, that look like a lack of potassium in my experience under qbs, like yours spiderfarmer, plants need more k than under hps or cobs. i give a little pk also in veg stage to manage the high outpu of the lamp. cheers