Concrete3511
Member
im feeding my coco ph of 5.3-5.5 but in my run off, i keep testing a 6.0 everytime?
Ph in Ph out?
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Airwalker16
Well-Known Member
Even 6.5 is better for some micronutes to be uptaken so if your runoffs 6.0, 5.8 might be just perfect, as he said.
Mellow old School
Well-Known Member
You dont go wrong by staying as one mentioned close to 6, in my experience a good level to be at...
Renfro
Well-Known Member
Is that a soil pH chart or coco pH chart? Kinda looks like soil, isn't coco usually run at a lower pH? I have heard 5.8, 6.0 from growers that were getting good results with coco. I am not a coco expert by any means so please correct me if I am wrong.
Airwalker16
Well-Known Member
Which Medium you use doesn't change the plants ability to uptake nutrients at the correct ph. Which is 5.8-6.3
Renfro
Well-Known Member
It just looked like that chart was sorta centered on 6.5 and thats ideal for soil and soiless mix. So if 5.8 is better for coco that chart seems to be cutting off Phosphorous uptake pretty hard at 5.8. I know coco buffers differently than soil and needs a lower pH like hydro.
Keesje
Well-Known Member
Why would the plants ability to uptake nutrients with a certain pH change with the medium it is growing in?
I see those charts for many years and always wondered why they are different in Coco, Soil and Hydro.
I know that different mediums buffer single elements differently, but is that the only reason?
TheHarvester
Active Member
Coco has a Ph of 6.5 to 7 so your water is being buffered up by the coco.
Like mentioned above, you'd be better in the 6-6.5 range.
Like mentioned above, you'd be better in the 6-6.5 range.
Keesje
Well-Known Member
If you look for example at Canna's info sheets, they say that with soil, coco, recurcilating hydro the best range is 5.2 - 6.2.
But if you look at the bottle of pH - or pH + it says 5.2 - 6.4
Everest Fernandez (the guy with the fastpaced video's) says that you can go to 6.5. But in another video he says that you should always remain around 5.8 and not let it drift.
So if these 'experts' don't know it for sure, how should we know?
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TheHarvester
Active Member
Trust the science my friend.
Learn how pH works and you will understand it and be able to manipulate it.
pH is a balancing act. Coco is 6.5 and the ideal range is 6-6.8 for nutrient uptake in plants.
Then water with a PH of 5.8-6.8 will work well.
The 6.5 pH of the coco buffers the 5.8 up to 6 or 6.2ish. And buffer down the water with the pH of 7.
That's how I understand it. The closer to 6.2 you are the better I think.
Learn how pH works and you will understand it and be able to manipulate it.
pH is a balancing act. Coco is 6.5 and the ideal range is 6-6.8 for nutrient uptake in plants.
Then water with a PH of 5.8-6.8 will work well.
The 6.5 pH of the coco buffers the 5.8 up to 6 or 6.2ish. And buffer down the water with the pH of 7.
That's how I understand it. The closer to 6.2 you are the better I think.
TheHarvester
Active Member
Exactly, no need.
Coco's pH is around 6-6.5 that's one of it's strengths. No need for buffers, actually the coco acts as the buffer.
Concrete3511
Member
had a problem with cal at 5.2-5.5 so i bump it up to 6.2 and there doing fine now!
Concrete3511
Member
3rd week into flower,was wondering if you can still prune the smaller bud sites lower branches ect??
TheHarvester
Active Member
Absolutely, the energy will be used up in the rest of the flowers.