Need help identifying a problem

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Cosmicbrain

New Member
I don’t know what is going on with my one plant that is in a 50/50 coco spangham peat moss mix that is a mix of dry amendments. The ph of the water goin in is always a little under a 6.5. I have two other plants in the same soil mix with no issues. The yellowing is on the tops between the veins on the edges and a few tips. It is 3 weeks into veg. 38C469BA-101B-49B2-86C1-1BAFFA76FA00.jpeg
 
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Frank Warthog

Active Member
Is it the same strain as the other 2 healthy plants?

I may be wrong but that looks like the beginning of a Potassium or Magnesium deficiency. I've never grown in coco so you may want a second opinion from someone else.
 
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Cosmicbrain

New Member
Frank Warthog said:
Is it the same strain as the other 2 healthy plants?

I may be wrong but that looks like the beginning of a Potassium or Magnesium deficiency. I've never grown in coco so you may want a second opinion from someone else.
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It is different from the other two strains. I was Leary to diagnose as a magnesium because of where on the plant it was. Maybe it’s a ph issue causing the potassium to be locked out.
 
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Cosmicbrain

New Member
Also maybe it’s potassium deficient because I took this cut from a flowering plant and it’s using a bunch to finish revegging
 
Mirrordawn

Mirrordawn

Well-Known Member
Peat moss sucks ... It gets compact when its wet and is very acidic. (This is coming from past experience)
Try using a coco perlite mix instead, you will have less issues in my opinion
 
NukaKola

NukaKola

Well-Known Member
Lower leaves look like a slight N toxicity and you might possibly have a lockout resulting from that or overwatering. That soil looks very moist, let it dry a bit.
 
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