yellowing rotting leaves brown spots 4 weeks into flower!!!

timrone

New Member
Hi everyone this is my first post on here and I am having a few problems, firstly I'll tell you a little bit about my setup, I am growing in a 3foot x 10 foot space, I have 2 600w hps and a 400w hps 3 lights in total. I am growing in 15 litre pots in plant magic soil using plant magic nutrients,the last week or so I have noticed yellowing leaves with brown spots and some with the leaf tips which appear to be turning brown and rotting away I am 4 weeks into 12/12 and would be grateful for any advice or input I have attached some photos for a better understanding
 

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shishkaboy

Well-Known Member
She is looking a little hungry to me, but what is your ph like?
Also, where is the problem starting/finishing?
Is it going from the bottom up, middle down? How is it moving?
 

timrone

New Member
Thanks deadgro I put my information in.
Shishka boy thanks for the quick reply, I am feeding full strength nutes and I was told that I wouldn't need to check the ph as the soil automatically corrects it was I mislead? And it seems to me like it's starting at the leaf tips and working it's way down I have never seen this before any more info would be great thanks again
 

deadgro

Well-Known Member
-Strain / kush
-Soil or nutrient brand/plant magic soil and nutes
and container type/sizes/15 litre pots
-Lighting type/setup/2x600w hps + 400w hps
-Ambient temperatures, both light/dark 30°c light/ 12-16 dark
-Relative humidity/ 35/70
-Sealed room/fresh air/added co2/ 6 inch fan blowing in from out side using ducting
-Pictures under WHITE light/ here are some pictures I have taken of the leaves that are concerning me
 

shishkaboy

Well-Known Member
Thanks deadgro I put my information in.
Shishka boy thanks for the quick reply, I am feeding full strength nutes and I was told that I wouldn't need to check the ph as the soil automatically corrects it was I mislead? And it seems to me like it's starting at the leaf tips and working it's way down I have never seen this before any more info would be great thanks again
What I mean is, does it seem to be affecting the older, bigger fan leaves at the bottom of the plant first, or maybe affecting the new growth first and then developing to the older leaves, a full body shot should answer my question.
 

deadgro

Well-Known Member
First, stop watering until the top 2 inches of soil are dry. Give it a week and see how new growth looks.
 

shishkaboy

Well-Known Member
I am feeding every other day giving 2 litres of water plus nuts to each plant it does seem that it's affecting more leaves everyday,t hanks
Sounds like a lockout to me, I would try watering with ph'ed water and measuring the runoffs ph. If there is a huge jump somethings def wrong.
 

weedenhanced

Well-Known Member
Hi everyone this is my first post on here and I am having a few problems, firstly I'll tell you a little bit about my setup, I am growing in a 3foot x 10 foot space, I have 2 600w hps and a 400w hps 3 lights in total. I am growing in 15 litre pots in plant magic soil using plant magic nutrients,the last week or so I have noticed yellowing leaves with brown spots and some with the leaf tips which appear to be turning brown and rotting away I am 4 weeks into 12/12 and would be grateful for any advice or input I have attached some photos for a better understanding
It's 100% normal for bottom leaves to die go yellow fall off and rot only real risk is mold in the dead leaves
 

shishkaboy

Well-Known Member
Yep, either a lockout of underfeeding. But since we know you are feeding a lot and frequently, I know its a lockout. Basically, there are too many salts built up in the container, making it near impossible to uptake the nutrients in the feed.
It is showing like a nitrogen deficiency, but more extreme/immediate, because its blocking out the nitrogen, and prolly others too.
Keep in mind, I am not an expert. Any advise from me should be researched so that you may draw your own conclusions, just giving you a starting point. Good luck.
 

calicocalyx

Well-Known Member
Did you switch to bloom food when you flipped the lights? I'd guess they used more nitrogen than you were giving them for the stretch. If that was the case I would give them a balanced NPK for a watering and see if the slightly more nitrogen helped. Improper watering could lead to salt buildup or fert imbalance, so flushing could help. Your leaves don't look to be clawing or twisting tho, which would indicate ph being off.
 
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