Deficiency?

[Bluey]

Ok. Cool.

First link

"During the majority of the grow your inflow pH should fluctuate around an average of 5.9. However, during the seedling and ripening phases it is best to target somewhat higher in the range (6.1-6.3)." It goes on to say "Ignore Run-Off pH
Although it is critical to adjust the pH of the inflow, you should not be concerned with the pH of the run-off water." That's what I say as it is a bullshit reading and unreliable, completely unreliable.

Second link states "Procedures to Follow When Using Coco-Based Mediums
FLUSH the medium on a routine basis. Every 1-2 weeks is what we suggest.
Check the run-off for proper pH level and (when flushing) for a low ppm/EC value.
pH the Medium to 6.0 pH to start with in Vegetative Stage. Drop down to 5.6 - 5.8 in fruit/flowering stage.
Do NOT over-water the medium."

So the above statement contradicts the first quote. Overwatering coco, well, that's extremely difficult to do and n8gh on impossible with a mature plant. Under 5.8 is out of range for me, no good at all. I flower 6.1ish to 6.3ish

And you edited the post and the links have gone.

So there is my point. Plenty of bullshit out there.

 

[Gingerbeard]

Yes. I removed a couple links because they got contradictory and opened up so many other worm cans, as you pointed out.
Yes. Plenty of contradictory information (bullshit.) That's why I ask. I value the experienced opinions in the forum more than in the articles I come across because I (online) know who some of you people are and see what you do. I have no idea where those other folks are coming from beyond their articles and bring what I read to y'all good people for further autodidactic enlightenment. See, after all this, I am considering raising my pH for flowering. Perhaps the next one. This one is getting my first ever bloom booster. But that's a story for my grow log...
But, seriously, do not marry your first cousin.

 

[Camboja]

Yes, what you're saying about pH makes a lot of sense! I think that in my case the plants are lacking food and I should aim for a pH of 6.2, right?

 

[Bluey]

I have gone to some length in the past to take accurate runoff pH measurements of perfectly healthy plants and found readings all over the place, into the low 4's and if I "corrected" the inputs to fix the run off I would have fucked my healthy plants.

Runoff is never a measure of anything in regards to pH. There is an enormous exchange of ions at the plants root zone which completely fucks with the pH outputs so it is wise to not even measure it.

As to pH at different stages I start at 6, once established, drop to 5.8 and up to 6.2 and slowly raise the lower reading and let the upper climb to 6.3ish. But make sure I hit 6.1 regularly for K & manganese uptake in flower. The charts for coco grows vary a bit re nute uptake but they offer a pretty good guide.

I should probably vary my pH a bit wider to the lower side especially for my sativas as they always run into strife in coco in flower and I don't know what the deficiency is, but if I back my lights off a little it doesn't happen so bad.

In soil pH inputs 6.2 to 6.5 in veg and 6.5 to 6.8 in flower as a rule.

 

[Gingerbeard]

Bluey your last sentence is what piqued my interest in this thread. Is Carolina Soil, soil, or more inert, like coco? Should CS follow traditional, premixed/bagged/corporate soil pH rec's or lean toward an inert medium pH? If someone told me to shoot for 6.8 in coco, I'd block them. But sphagnum is not coco.

 

[Bluey]

I think the most controlled grow is pure hydro like DWC or aeroponics, no medium to worry about and a starting pH of 5.8 and let it climb. What could go wrong? Lol

The OP probably has it sorted already. I'd give it 7 then 6.8 for a few feeds then see where im at.

 

[Camboja]

Hi guys, here's my update. I watered it with a pH of 6.8 until it reached 6.6/6.7. I am giving it about 1100 ppm of fertilizer. It seems that the leaves have continued to turn yellow or even the tips of the leaves are different.

 

[Bluey]

You are burning them badly. with the nutes.

Reduce the ferts to below 900 ppm, Maintain the high pH, 6.3 to 6.6

 

[Camboja]

Tks brother!