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
A little advise would be appreciated
- Thread starter Clump354
- Start date
I'm using flitered water..ppm 100ish..I cut that leave during trimming...pics coming soon
Shape Shifter
Well-Known Member
Shape Shifter
Well-Known Member
Hes not using RO water. Its 100ppm.
I'm use tap with Pur filter
Shape Shifter
Well-Known Member
That's fine. It's not RO. It doesn't filter minerals.
Shape Shifter
Well-Known Member
The problem is starting from the top. That narrows it down quite a bit.
Kalebaiden
Well-Known Member
It's a Cal/Mg issue.
Fix that and you're golden.
Fix that and you're golden.
Shape Shifter
Well-Known Member
Kalebaiden
Well-Known Member
Phosphorus issues start at the bottom of the plant.
His issue is at the top, which indicates it's a Cal/Mg issue.
His issue is at the top, which indicates it's a Cal/Mg issue.
Budzbuddha
Well-Known Member
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
Well-Known Member
Not a reliable reading.
Budzbuddha
Well-Known Member
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
Well-Known Member
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.