What deficiency is this ?

[BurnzyBurnz]

So I'm 6 weeks into flowering and the last week this has happened. I spotted it right away and started feeding calmag and nutes however it doesn't seem to be clearing up and I don't want it to get outta hand. I thought it was a nitrogen of iron deficiency. I now am not sure. Any suggestions?

About the plant...

12/12 lighting
23C / 55% humidity
In soil 7Gal pots
Ph water at 6.5

 

[Dr. Who]

All the same strain?

Anyway - P tox = too much P in the bloom mix.
What's the nute line BB?
Do you use any booster?
Soil?
Water source?

Using extra N will slow the progression down some but, that issue. They won't "recover" only slow down with some N added.

 

[BurnzyBurnz]

All the same strain?

Anyway - P tox = too much P in the bloom mix.
What's the nute line BB?
Do you use any booster?
Soil?
Water source?

Using extra N will slow the progression down some but, that issue. They won't "recover" only slow down with some N added.

2 strawberry lemonade
2 hash plant

In organic promix veg & herb soil.

Nutes for bloom = 3/6/6 I feed every 3 or so plain waters.

No boosters.

I water with tap water ph'd at 6.5

The other 3 girls are doing just fine however this one girl is struggling a bit as of late. First problems with these ones so far.

So long story short I can't correct this ?

 

[hotrodharley]

Green veins in lightened leaves says magnesium deficiency. Why are you feeding soil that has nutes in it already?

 

[BurnzyBurnz]

Green veins in lightened leaves says magnesium deficiency. Why are you feeding soil that has nutes in it already?

I really only feed them 3 or 4 times since birth. I feel I haven't feed them much. And I half dosed it too. So if it's a magnesium issue how might you suggest I fix this ?

 

[hotrodharley]

I really only feed them 3 or 4 times since birth. I feel I haven't feed them much. And I half dosed it too. So if it's a magnesium issue how might you suggest I fix this ?

Well I am not sure. An excess of any one element can cause nutrient lockout. This might be why you are seeing this at this point. Usually with complete soils you just water until you note a deficiency and that’s nearly always nitrogen.

 

[BurnzyBurnz]

Well I am not sure. An excess of any one element can cause nutrient lockout. This might be why you are seeing this at this point. Usually with complete soils you just water until you note a deficiency and that’s nearly always nitrogen.

Right on thanks.

In all fairness I feel like that's basically what I did but perhaps a little more than I should have outta greed. Live & learn.

 

[hotrodharley]

Right on thanks.

In all fairness I feel like that's basically what I did but perhaps a little more than I should have outta greed. Live & learn.

Can you measure EC on some runoff? Do you have a meter?

 

[BurnzyBurnz]

Can you measure EC on some runoff? Do you have a meter?

Yeah I could do that.

 

[Dr. Who]

Slow it down to finish ok? = yes

Correct the issue, so leaves are green and happy again? = No

Still a P issue - Went back and looked again.

Try a basic 30 day soil.....