Yellow/brown spots on plant leaves

Harrekin said:

Or realistically its because he aint fed any nutes yet and the plant is hungry? Claiming everyones "yellow with brown spots" problem is some mad fungus is ridiculous, and this is the second thread you've posted that answer on today.

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Every thread I see with plants like that do not get resolved by all the common claims made over and over. I have made multiple myself. I heard it all. Mg, K, N, and Ca deficiencies, bugs, heat issues, ph issues, light issues. I ruled every one of these out with my own grow. I wish someone would have chimed in that it could possibly be septoria in ANY of my threads because it would have saved me a ton of time and hassle.

ops plant:



first 5 hits on googles image search for "septoria leaf"











I dunno, do you see the similarity?

Seriously, it could be 1 of 100 things, might be what you have, but you cant go TELLING people that its a (rare enough indoor) fungal infection from doing picture comparisons with Google of all things...come on man, if you had a pain in your head and the doctor took one look at you and said it was cancer, would you believe him from just that?!

EDIT: And the only similiarity I see with that and your pictures is some leaf necrosis, which can be caused by ALOT of different things.

And here is a pic of my plant that I believe has septoria:



If you have a different diagnosis please go to my thread https://www.rollitup.org/marijuana-plant-problems/389154-yellowing-brown-spots-again.html and help me out. Take note of everything i've already ruled out though.

Harrekin said:

Seriously, it could be 1 of 100 things, might be what you have, but you cant go TELLING people that its a (rare enough indoor) fungal infection from doing picture comparisons with Google of all things...come on man, if you had a pain in your head and the doctor took one look at you and said it was cancer, would you believe him from just that?!

EDIT: And the only similiarity I see with that and your pictures is some leaf necrosis, which can be caused by ALOT of different things.

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If the doctor had to diagnose me via a message board I would certainly take his advice into consideration. I also don't think just because it is rare it should be left out as an option, even though it looks exactly like it. Maybe it's nutes? Maybe it's not. All I know is I wish someone would have pointed me in this direction months and months ago as I have ruled out every other possible option that has been suggested, and no one ever suggested septoria. Possibly could have saved myself a lot of pain by simply using some fungicide after it happened the first time.

Also he posted an update 3 weeks later and the problem is still on the plant. Why didn't the nutes rectify the situation if that was in fact the problem?

I aint gonna make a diagnosis on yours because I dont know what that is, but the OP on this thread hasnt used any nutes yet and has some leaf necrosis...a full spectrum balanced feeding should probably be the first thing he tries, not a septoria treatment cos one person thinks it "looks like it".

EDIT: To me it looks like it could be the start of a potassium deficiency, the leaves start out like that, curl under and dry out to a hard crispy brown.

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.

Harrekin said:

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.

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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.

NONE of those plants are Septora or any other disease. What people must understand is when diagnosing your plants problems, that is only part of the problem! When you start to address the problem it takes time for the results to show, and most people are expecting a quick reaction. Once your plant starts showing diff...It may take up to a week to show results and they won't be in the effected leaves. The post above mine is a common NPK problem.

A little update!

Well here is Shannon again. This time we are in flowering stage of the plant cycle. On 12/12 light cycle. Water every two days. Using some ferts now, went with tthe 10/10/10 (thnx for advice: guy incognito) Here we have some pics of Shannon.



A close up at some Pistols.

A nice overall Pic.

The TOP

And another.

Another close up.

Id say we about 2 weeks into flowering. Smells really great!

hey injction, what nutes u use? I have had similar probs for a long time. Was thinking some crazy disease. Guy, what u use for fungicide? Copper and serenade didn't help mine, nutes didn't either, bit umi go light. TY

Miracle-Gro 8 Oz. Houseplant Food - its 10-10-10