And dude,seriously, every thread on this forum now has a post saying "could be septoria" as one of the potential problems. I know its easier to swallow "the magical fungus" being your problem rather than an actual problem with your growing technique, but 9/10 its just something basic thats been overlooked or done wrong.
Dude it was 7 threads, and 3 of them were mine. So I think at least 3/7 of the threads the problem was *NOT* something simple that was overlooked, I corrected EVERYTHING and STILL have the problem. Clearly NO ONE on RIU was able to diagnose my problem in my first 2 threads. I hope someone finally did in my third.
He started the thread 3 weeks ago and has had the following solutions proposed to him:
The spots looks like calcium deficiency. Try using some cal / mag or Molasses or dolomite lime. Any of these would work. From the purple stems you also got what looks like a phospherous deficiency, but that could also be due to low temps.
lockout...
looks like its over fertilized to the extent that its locking out other nutrients
or it was over fertilized,then starved
Yes, the more light the better. The sun give out a crap load of lumens per square foot, think it's around 10 000 lumens per square foot. You will never reach that sort of lumen output with light but you can definitely try and get as close as possible.
This could be nitrogen dificiency but it could also be due to overwatering. Your soil does look pretty wet. You say you are watering about every 2 days. Is the soil dry when you are watering? Also what nutrients are you using.
then ill go with my 2nd guess
i assume ur soil had nutrients
clearly it was over fertilized at one point in its life(earlier on, since the claw is on older leaves)....
now that this piece of info is available,i think its safe to say it needs to be fed
get some fertilizer and feed with light strength in the proper ph range
Get something that fairly balanced like 10-10-10 and contains micro nutrients such as boron, iron, magnesium etc.. Nutes lower in P & K and higher in N will also do.
looks like nute def. possible cause by ph fluctuation that can lock out nutes if your ph is off
Plus even more suggestions.
Then 3 weeks later he posts yet another picture of the same plant and it looks like it might be septoria.
Either he didn't listen to anyones advice or he followed the wrong advice, or no one identified the real problem. Just in case no one identified it i'm offering a possibility. I know it's frustrating to post on RIU, get advice, follow advice, and still see a decline in your plant. Rinse and repeat. Week after week after week.