Random dead patches on leaves?

Nutty sKunK

Well-Known Member
Week 6 of flowering and past couple of days these patches have come up.

They are very random. The only logic I see behind it is that it’s only affecting the middle of the plant.

They crop up fast and don’t progress.

Any ideas as to what this could be?

I could write down all my conditions but I know they’re fine. Only thing that is lacking in my plants diet is potentially calcium since my water is very soft.

The yellowing is a lack of sulphur which is being fixed.

Any ideas guys? Haven’t seen anything like this..
 

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Nutty sKunK

Well-Known Member
Have you sprayed them whilst lights on?
Have you checked for bugs?
No never been sprayed while in flower.

Had a wee look for bugs but the same patch is on another plant (same strain) but it only has 2 of these patches.

I did notice that in the morning where leaves overlap it can be wet under there from the plant ‘sweating’

But there’s certain leaves which are showing this yet they aren’t being over lapped as far as I’m aware..
 

westcoast420

Well-Known Member
More often than not excessive yellowing like you have there is nitrogen difficency. I think you have more than one issue going on, could be lockout. What medium are you in and how many ppm are you feeding them?
 

Nutty sKunK

Well-Known Member
More often than not excessive yellowing like you have there is nitrogen difficency. I think you have more than one issue going on, could be lockout. What medium are you in and how many ppm are you feeding them?
Well I was actually suffering from N toxicity 3rd week in flower. Was fine up until the stretch stopped then her needs quickly went from N to P and K. Not knowing this I just kept doing what I was doing and that went dark and started curling.

So I stopped feeding her. Admittedly probably too long as all the bottom yellowing you see is potassium deficiency and the top yellowing is sulphur.

I fed her last watering and all the damage just stopped. Which is lovely news!

I fed her 438ppm on 35ppm water ph 5.8 (soil buffers well so no need to ph my nutes)

Now what I’m thinking is a half feed today.

I’m using spagnum moss so it has no real nutritional value. I’m feeding with synthetics :)
 

westcoast420

Well-Known Member
Too each there own, but 438 ppm is extremely low for a plant over a few inches tall. Thats what i give my seedlings the first week. Those girls are starving! But if those low ppms are working for you then rock on.
 

Nutty sKunK

Well-Known Member
Too each there own, but 438 ppm is extremely low for a plant over a few inches tall. Thats what i give my seedlings the first week. Those girls are starving! But if those low ppms are working for you then rock on.
I know! It’s crazy. They really don’t want much food at all. Ever since they’ve been young they’ve been extremely light feeders. One phenotype can handle a higher feed I’m pretty sure. Thi

They are 90% sativa which general means less food. Also being in a dry environment encourages them to eat less as their stomatas remain closed.
 
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