A little advise would be appreciated

[Clump354]

Hello everyone...looks to me to be a cal mag deficiency but I'm a new grower so I wanted a OG's opinion. Im growing in soil its my 2ed month in veg..nutes are ff trio and I just started cal mag plus last week due to these spots on my leaves.. Soil ph is a little above 7 (one of those 10$ meters for light..moistened of soil and ph) so not really sure whats wrong. Also the spots are on upper newer growth..found 3 leaves like this

 

[JCGreen81]

I’m not an OG but cal mag issue pretty rare unless you’re using RO water

what type of water are you using?

do you have picture of the entire plant and the other leaves around this particular one ?

 

[Clump354]

I’m not an OG but cal mag issue pretty rare unless you’re using RO water

what type of water are you using?

do you have picture of the entire plant and the other leaves around this particular one ?

I'm using flitered water..ppm 100ish..I cut that leave during trimming...pics coming soon

 

[Clump354]

Here they go

 

[Clump354]

Also do u think indirect sunlight could have done this...i had to take her out the tent and i put it in another room with little sunlight coming through

 

[Wattzzup]

Why do people use RO water in soil? Then post cal mag issues? Switch to tap water and ph to 6.5

 

[Shape Shifter]

phosphorus excess

https://i.redd.it/qhrj8qmjl7az.jpg

 

[Shape Shifter]

Why do people use RO water in soil? Then post cal mag issues? Switch to tap water and ph to 6.5

Hes not using RO water. Its 100ppm.

 

[Clump354]

Hes not using RO water. Its 100ppm.

I'm use tap with Pur filter

 

[Shape Shifter]

I'm use tap with Pur filter

That's fine. It's not RO. It doesn't filter minerals.

 

[Clump354]

Cool..so does anyone second the phosphorus idea??

 

[Shape Shifter]

The problem is starting from the top. That narrows it down quite a bit.

 

[Clump354]

The problem is starting from the top. That narrows it down quite a bit.
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The problem is starting from the top. That narrows it down quite a bit.

Thanks Shape Shifter

 

[Kalebaiden]

It's a Cal/Mg issue.

Fix that and you're golden.

 

[Shape Shifter]

 

[Kalebaiden]

Phosphorus issues start at the bottom of the plant.

His issue is at the top, which indicates it's a Cal/Mg issue.

 

[Budzbuddha]

Cool..so does anyone second the phosphorus idea??

NO ....

You at the upper limits of ph at 7.0 for soil.
There is no reason to rely on cheap soil meters when all you have to do is keep a stable ph of whats going in. Meaning control the ph of your water and or mix to “ better “ match the range needed for soil ..... 6.5.

Those leaf issues are signs of a PH issue or swing.
Cannabis does NOT need special water ...

 

[Shape Shifter]

You at the upper limits of ph at 7.0 for soil.

Not a reliable reading.

 

[Budzbuddha]

If you use RO or distilled water, the chances are high that your plants are getting next to no Cal-Mag. The same also applies to situations where you are using growing media like coco coir.

 

[Kalebaiden]

Soil ph is a little above 7

Good catch, I missed that part.

It still looks like a Cal/Mg issue but the pH needs to be fixed.

A easy fix is dolomitic lime as a top dressing. It stabilizes soil and gives Cal/Mg as well.