Magneese def? Nitrogen def?

[WITC]

Symptoms- pale yellowing leaves
Medium- coco
Nutrients- Gaia green 2-8-4 & 4-4-4
Water- tap sat out 48 hours @ 6.4 per mr Canuck
Temp- 80 day 70-72 night
Rh- 60
Strain- Dutch passion white widow
Lights- 6 qb96 @ 400 watts
Tent- 4x4x80

I have been adding 3 to ml cal mag the past 4 watering thinking it was a mag def but the plant hasn’t responded. The bigger one started the flower stretch just a few days ago

 

[Arthur]

Your probably going to have to find someone growing with his style, it's on odd one... Most of us old timers grow soil, or coco, we might add a little coco to our soil, but not add amendments to coco and treat as soil. Honestly it negates the advantages of using coco.

Mixing the two styles handicaps us as my recommendations would be entirely different between a soil and a soilless run.

The curled under foliage has me leaning twards an issue with your pH... but here then is the issue... soil run pH should be 6.2 to 6.6... but a coco run should be 5.8 to a high of 6.2.

 

[WITC]

Everything that you just said makes total sense! And I understand. All of my new plants are in plain soil lol and I also ordered new nutrients ( mega crop) not that there is anything wrong with Gaia green. I jus want to know that my plants are getting what they need when they need it. I posted these same pics on another site at the same time. And had one person say ph problems also. He thought I should flush

 

[Arthur]

Everything that you just said makes total sense! And I understand. All of my new plants are in plain soil lol and I also ordered new nutrients ( mega crop) not that there is anything wrong with Gaia green. I jus want to know that my plants are getting what they need when they need it. I posted these same pics on another site at the same time. And had one person say ph problems also. He thought I should flush

Give this thread a look, some of the guys have been working thru it it looks like. Looks to me like they keep adjusting the pH down, grow to grow.

https://www.autoflower.org/threads/anybody-grow-like-mr-canucks-grow-from-youtube.69880/page-11

 

[Arthur]

Well... flush is what I'd do on a coco run! Flush to the right pH and carry on!

But on a soil run... flushing is a last resort...

 

[WITC]

Will start reading it now! Thank you! I may just try a lower ph for a few waters and see. But I may say different after I read through that canucks post lol

 

[Mañ'O'Green]

You need to know the PH in the root zone. You need to get an Accurate 8 PH soil probe (or the clone) or a Blue Lab soil probe. If you go with Blue Lab be sure to get the correct one as they make several. Do not bother with any of the cheap ones as they do not work.

What is the PPM of your starting water? Too much calcium can lock up the magnesium. Gaia source for calcium is gypsum among other slower acting rocks. Maybe too much in the batch?

 

[WITC]

I only have a ph meter. I ordered a apera ec meter tonight. So I don’t know the original water ppm. I have been reading tonight on how to check the run off when I water. Do you think that would be a good place to start?

 

[WITC]

Is this the correct soil ph meter that I need to order?

 

[Mañ'O'Green]

Is this the correct soil ph meter that I need to order? View attachment 1225141

Yes. good to see they are back in stock. Even though I personally use Blue Lab a lot of peeps here have good luck with the Accurate 8?