Problems problems

[Monty Verde]

This is my 3rd grow.
And this time I changed nutes and soil to 100% organic.
It started with something looking like mg deffincy. The leaves turned lime / yellow between the veins.
And then I added mg but it keept on. And then the ”rust” begun.
Now they 6 out of 9 look like this.
I have 3 strains:
White widow
Northern light
Gsc (but they look great)
Fat leaves, thats curved and ’droppy’ (?)

I did a test and flushed one of them but it didnt get any better. I did thou flush with normal tapwater. We have nice water here. PH from tap is 7.0-7.8
I did give it a low dose of nutes (NPK 33) and some mg after flush.



What Strain is it?:
Northern light And White widow
(Also gsc but they look great)

Is it Indica, Sativa or Hybrid?
Ww 50/50%
NL 100% indica

How Many Plants?
6 out of nine looks like this.

Is it in Vegetative or Flowering Stage?
Vegetative

If in Vegetative Stage... How Long?
About 6 week (had light problem the first weeks thats why they still small)

If in Flowering Stage... How Long?

Indoor or Outdoor?
Indoor

Soil or Hydro?
Soil


If Hydro, Reservoir size?
If Hydro, Reservoir Temperature?
If Hydro, what type of Medium?
If Hydro, what type of Setup?

If Soil... What is in your Mix?
Premix organic from large producer.
PH 5.5-6,5
NPK
N-160
P-60
K-410

If Soil... What Size Pot?
15 liter

Size (Wattage) of Light? How Many?
6 pcs of quantumboards
810 w total from wall

Is it Air Cooled?
Sort of.. have a fan blowing at em

Temperature of Room/Cabinet?
25-28

RH of Room/Cabinet?
40-55%

PH of Medium or Reservoir?
Runoff when watering with pH 6.5 is
6.8
Do I water to fast? There is not much differens here.


Any Pests?
No

How Often are you Watering?
When dry. But last week I watered a little frekvent I think. Did so to get more mg in the soil but I wont do that again

Type and Strength of Fertilizers used?
Organic NPK 33
Roughly - 450 ppm (0.7 ec )

Size or Square Footage of Room?
2 squaremeters

Air changes or what you call it happens once a minute. Very good airflow.

I have also circultating fans


I also need to say that I tried lower pH in the begining since I hade good results with that in my other crops before. But that was different soil and nutes.

Please help

 

[Monty Verde]

The back of the leave looks fine. No rust there.

 

[Emilya Green]

Looks like a magnesium deficiency... get some calmag+ and start adding it to every watering right up to 2 weeks before harvest. You are also doing the pH thing all wrong... adjust every fluid that hits your soil to 6.3 pH... the low end of the scale, and then let your soil's drift move the pH for you all the way through the 6.3-6.8 range.

 

[Monty Verde]

Thank you

Well as I Said I’ve been watering with PH 6.2 before but since the problem started I rised the pH to 6.5. But only for a few waterings. Going back to 6.2 or 6.3 as you Said.

One thing that doesn’t add upp for me is the fact that the soilbag has this info on it:
’This soil has pH 5.5-6.5’

If I water with pH 6.3 then the soil drift up to only max of pH 6.5? That means that no matter how much Mg I put in it wont be able a good uptake? Right? Som ’nutes’ uptake starts at pH 6.5. (?)

Looking att that ’nute chart’ and thats what it looks like to me. Can I do anything to fix this? I have unfotunally purchased a hell lot of soil allready.

 

[Emilya Green]

That does seem a little low for a soil and silly to put a range on it... you might want to do a slurry test to see what the base pH really is. Depending on the soil, you might need to some dolomite lime or something to get that base pH raised a bit. And, Mg starts to be mobile right in there at 6.5-6.6... so if it is in fact only going up to 6.5, you are getting a little bit.

 

[Monty Verde]

Thanx again.

I Will do a slurry-test. Just have to look at youtube first.

 

[Emilya Green]

This chart should help allay some of your fears. Mg is mobile across a wide range as are many of our needed elements. It is just to get maximum mobility for all the elements, the math agrees that 6.3 is the optimum point, and then any slide north of that is a good thing.

 

[Monty Verde]

This chart should help allay some of your fears. Mg is mobile across a wide range as are many of our needed elements. It is just to get maximum mobility for all the elements, the math agrees that 6.3 is the optimum point, and then any slide north of that is a good thing.

Ah nice
The girls look a little better today but its a long way to look healthy

 

[Emilya Green]

I generally give 3 wet/dry cycles to clear a problem once it is identified .. be patient. Glad to hear they are recovering!