The Absolute Truth About PH

Nutty sKunK

Well-Known Member
So I wanted to clear this up. When I do a google search for proper PH levels for cannabis, most of the responses say between 5.8 - 6.2 is optimum. But I find posts everywhere on multiple forums saying 6.5 - 7.5 is optimum. I find others that say between 6-7. What is the consensus here?

And I'm talking soil, standard top down watering, after nutrients are mixed into the watering pail.
Soil pH of 5.3 and I feed pH 9-10 early veg.

Day 14, about a ft wide.

Microbes are what matters most in soil. Next pic is her 28 days later.

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TheWholeTruth

Well-Known Member
So I wanted to clear this up. When I do a google search for proper PH levels for cannabis, most of the responses say between 5.8 - 6.2 is optimum. But I find posts everywhere on multiple forums saying 6.5 - 7.5 is optimum. I find others that say between 6-7. What is the consensus here?

And I'm talking soil, standard top down watering, after nutrients are mixed into the watering pail.
In good organic soil and when using good organic feed you shouldn't have to worry too much about ph. The micro life in the soil adjust and breaks it all down to the right level for the plant. You have to just feed your micro life with a bit of sugars every now and then. But if you do want to keep aneye on ph and your feed instructions say to adjust for best results in soil I would ust stick to 6-7 and you should be fine. Sometimes a bit of a gentle swing is good within the usual range.
Also just to add, too acidic/too low ph in soil can kill or hurt the micro life.
 
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ALPHA.GanjaGuy

Well-Known Member
'They' are google. Instead of laughing about it, answer the question.
That's not how google works.. You read a snip from the link below it and would need to click the link to get the full story, you read what fluence.science says not google and fluence.science does not mention the medium they are referring to so the link and story are king of useless..
 

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Wizzlebiz

Well-Known Member
'They' are google. Instead of laughing about it, answer the question.
50% of the time Google gives you the wrong answer. 90% of the time the answer it reads you is a snipit from a forum or some arbitrary article.

To answer your question no lower that 6.0 and not higher than 7.0.

Also if you are using the proper soil and amending at the correct times (which is paramount to your success) you will not need to worry about PH levels.
 

DoubleD5374

Well-Known Member
Sounds like you have lots of calcium carbonate in your water. That will add alkalinity and make the pH want to rise. Bubbling it will also raise it, but not as fast as alkalinity. What's your water like?
Very high ph from the get go , I’ve never done a full on test , but I have no issues as far as my ladies loving it
 

Antidote Man

Well-Known Member
I figured I'd close this up with some more information. I was talking with Dr Greenthumb on phone, he said my output PH should be 5.7, water coming out at the base of the pots. I never water like that, I water less, more often, than the other way. I don't even use plastic dishes to catch the run off. I found some high end ph pens for soil, got an open box bluelabs for 100$. He said they don't work. That's all I have for checking the soil ph, but I might also flood my pots and check from there. You learn something new every day..
 

PadawanWarrior

Well-Known Member
I figured I'd close this up with some more information. I was talking with Dr Greenthumb on phone, he said my output PH should be 5.7, water coming out at the base of the pots. I never water like that, I water less, more often, than the other way. I don't even use plastic dishes to catch the run off. I found some high end ph pens for soil, got an open box bluelabs for 100$. He said they don't work. That's all I have for checking the soil ph, but I might also flood my pots and check from there. You learn something new every day..
Runoff isn't a good way to check. It can give you an idea but it can also be misleading. BlueLab makes decent stuff, and it works. Apera makes some even nicer stuff I think.
 

BucketGrower

Well-Known Member
If you guys had PH of water of 8 and above, would you still bother to ph water when growing in soil? I'm too scared NOT to ph down my water hah. Maybe I should do a test plant that doesn't get the ph down.... hmmm...
 

DoubleAtotheRON

Well-Known Member
If you guys had PH of water of 8 and above, would you still bother to ph water when growing in soil? I'm too scared NOT to ph down my water hah. Maybe I should do a test plant that doesn't get the ph down.... hmmm...
They will get nute lock out for sure at 8... unless your soil buffers it down. Every soil mix reacts differently. Some are stable, some crash.
 

BucketGrower

Well-Known Member
They will get nute lock out for sure at 8... unless your soil buffers it down. Every soil mix reacts differently. Some are stable, some crash.
Thanks for reply. Yeah, the soil I use is quite active and has lots of ingredients. I'm kind of curious to try it on a few plants in the future. No Ph down at all vs plants that had their water ph'ed to correct range.
 

DoubleAtotheRON

Well-Known Member
Thanks for reply. Yeah, the soil I use is quite active and has lots of ingredients. I'm kind of curious to try it on a few plants in the future. No Ph down at all vs plants that had their water ph'ed to correct range.
Good. You're experimenting. I like you already. Throughout my years in the commercial side, I'd do some crazy shit just to see what would happen.... keep it up.
 
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