Hey! This plant has been looking weird for a while now. It's growing in a homemade ebb and flow system, being watered every 6 hours for 15 minutes each. I use hensi hydro veg fertilizer, but nearly nothing since i have fresh seedlings growing from the same setup. To me it looks like it needs more fertilizer, which would make sense, but i obviously can't feed it anymore without killing the seedlings. Anyway it could be something else, i'm definetly a rookie Please take a look at the attached photo, and thanks in advance
maybe potassium? maybe magnesium? maybe zinc honestly idk im no expert but look up pics of those deficiencies and see which most resembles your plant until someone better answers
i think you're gonna run into real big problems with that grow method though, one plant is going to finish earlier than the rest and the roots might get all tangled then you have rotting roots in your system, idk the whole thing seems iffy to me, i learned early if you're not an expert keep 1 plant per pot so if one goes bad the whole crop isnt ruined.. any chance you could turn that ebb flow system into DWC? obviously would be more work but probably better for learning, and for catering to each specific plants needs, one system is really good when you're using something like clones when every plant starts and finishes at same time, and has the same appetite for food lol but idk i'd reconsider if i was you!
My leaves are discolored as well! Yours is further along so I would agree with the above that it's likely nutrient deficiency. Mine is only a seedling, but looks similar: http://forum.grasscity.com/sick-plants-problems/1340083-please-help-my-sick-seedling.html?fromsearch=1