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Deficiency?

'Carolina Soil' is a misnomer. It is no more soil than a coco/perlite/limestone blend is soil. That might be an issue in people recommending raising your pH.
In my previous post, I asked about the inertness of Carolina Soil vs coco/perlite, which is what I use. Coco/perlite nutrient solution pH usually runs 5.8. Up until now, it looks like you have had a right-fine grow so your pH has been pretty good. I am questioning raising your pH at this point because growing in an inert medium like coco has recommendations to lower pH during flowering.
I also noticed the date on one of your bottles. Is that an expiration date from 2022 or when you bought it?
 
Lowering pH in coco from veg to flower? Well I've been raising it in all my grows now, starting at 6.0H and once established 5.8 to just above 6.2 in veg then 6.1 to 6.35 in flower. That was working for me.

Do you have a source Gingerbeard for the lowering pH for flowering in coco?

Reason I say Kampuchea needs to raise is because of the following,

1. Now in flower and veg to flower normally requires a small raise for uptake of flowering nutes
2. Magnesium is locked out in the lower pH ranges
3. Lime is put in the medium to offset the low pH of peat but it breaks down and is used by the plant as Cal which may lower the pH in the medium over time

That's my take on it
 
My info came from googling 'coco pH during flowering' then following what came up. Reddit, ILGM, GreenCoast Hyrodponics. Perhaps I misunderstood? Perhaps this is a 'you do you after your experience'?
I fluctuate between 5.5 and 6.0 throughout but shoot for 5.8.
My thing with this is determining if Carolina Soil needs soil or inert pH considerations.
 
Well manufacturers of the nutes would be a good start, published journals, papers on trials from universities, etc
 
How, pray tell, do you get your information from the manufacturer, papers, journals, and such? Perhaps you have an assembled pantheon of go-to manufacturers' papers, journals, and such in paper form? Pray, tell!
I know my bottles of nutrients say 'Adjust pH accordingly.'
 
If you go to the manufacturers website you can typically download data sheets, SDS, feed schedules etc
.
If you are a student at a university that will give you free access to pretty much all published papers researching cannabis via your library subscription. A lot of these papers are also online for those without subscriptions.

You can also search for people who undertake research for a living. They are typically affiliated with a university and often publish their own research, eg. Dr. Bruce Bugbee and founder of Apogee
 
Soooo... you started with a google, not necessarily starting with Google, to access all that information? [google] has become a transient verb. I could have said 'done an internet search' or 'searched the web' and it would mean the same thing as 'I googled.' Without picking up the phone or writing for the information you mentioned, or maybe a library run after requesting a shit ton of books, you googled.
And published research? GWE and the Forum are pretty good sources of published research information. I am a lot more likely to grow in a ghetto setup than sterile lab environments with probes and monitors from which the information is written.
You little blue monkey.
 
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Thank you very much for the answers, I will try to raise my pH to 6.6! No, it is the manufacturing date of the nutrients 2022. I really confess that I am a little afraid of raising the pH! But I will trust you.

carolina soil composition:
Peat 50% and Perlite 50%​
 
70% Sphagnum Peat + 30% Vermiculite + Limestone

Based on Sphagnum Peat.

Carolina Soil is an excellent quality organic substrate.

- Electrical conductivity: 0.7 EC
- pH: 5.5 variation of 0.25;
- WRC % m/m (water retention capacity): 350
- Dry density (kg/m3): 130
- Physical composition: Sphagnum 78% + 22% Vermiculite + Dolomitic Limestone + Macro and Micronutrients from fertilizer sources
 
No problem my brother, I'll post pictures of how the plants looked in 7 days? So I can see the results, right?
 
Yes. GWE is an excellent source and often they reference the source material. They even do their own experiments which is super cool. I'm into that!

There is an enormous amount of crap out there that is simply not correct. I've seen some complete doozies and totally false info published by cannabis Web sites. Beware.
 
So here's what I want to know @Gingerbeard

Where did you find the information that you should lower the pH in flower relative to veg?

This in my mind is not the correct approach so I'm keen to find this source as I want to know why they are saying that.
 
Bluey I never made a recommendation about pH, either way. I questioned raising pH when I had read otherwise. I do not recommend on pH or nutrient issues, only give experience and ask questions. It would be inappropriate for me to recommend on such things because I have not had to overcome pH or nutrient issues. My recent advice has pretty much been limited to, 'Don't marry your first cousin.' and 'Don't top autos.'
CoCo Hydroponics - GreenCoast Hydroponics Knowledge Center​
​
 
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