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Invisiblebrifunforme
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PH different for veg/flower?
    #406586 - 04/25/10 07:54 PM (6 years, 7 months ago)

Ok, I know hydro the ph is supposed to be lower like in the 5.5 range or so right?

I just read somewhere that the ph should also be different for veg and flower. My question is in regards to both soil and hydro. What in your opinions is the perfect PH for veg and for flower in both hydro and a soil system?


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InvisibleHawksresurrection
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Re: PH different for veg/flower? [Re: brifunforme]
    #406589 - 04/25/10 08:00 PM (6 years, 7 months ago)

pH is the same for both flowering and veg.  There is no difference.  5.8 for hydro and 6.5 for soil.


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Dude she isn't as young as she use to be.

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Invisiblebrifunforme
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Re: PH different for veg/flower? [Re: Hawksresurrection]
    #406616 - 04/25/10 09:37 PM (6 years, 7 months ago)

K, thanks for clearing that up. Thats what I thought but I just read on here somewhere that someone changes their PH during flowering. Maybe I miss read. :/


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Invisiblecaptain.koons
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Re: PH different for veg/flower? [Re: Hawksresurrection]
    #407397 - 04/27/10 01:18 AM (6 years, 7 months ago)

Quote:

hawksapprentice said:
pH is the same for both flowering and veg.  There is no difference.  5.8 for hydro and 6.5 for soil.




Not entirely true, actually it's not true at all.

pH has to do with availability of nutrients at different levels of acidity. So some people start their hydro off at 5.5 pH and raise it up to 5.8-5.9 pH. I personally keep it at 5.5 pH throughout as I find this is the best pH for avoiding deficiencies/lockout.

The acceptable range for hydro is 5.5-6.0 soil 6.2-6.8 some say as high as 7.


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Invisiblebrifunforme
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Re: PH different for veg/flower? [Re: captain.koons]
    #407478 - 04/27/10 07:02 AM (6 years, 7 months ago)

Thanks captain! Are there any graphs or anything out there somewhere that show the nute intake for pot at different ph levels? I thought I had seen one a long time ago on another site but I have no idea where it was.


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Invisiblecaptain.koons
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Re: PH different for veg/flower? [Re: brifunforme]
    #407549 - 04/27/10 02:14 PM (6 years, 7 months ago)



There you go.


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OfflineDieselB
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Re: PH different for veg/flower? [Re: captain.koons]
    #407553 - 04/27/10 02:25 PM (6 years, 7 months ago)

Some people will also keep a continuous swing going with their Ph, high one feeding, low the next. I say whatever you find that works efficently for you, go for it.

Koon's, do you have any reading or links on this stuff? I'm interested to see that chart, the one I have didn't show the change in actual availability level relative to the ph. Come to think of it, thats the chart in my local garden store that I ignored.


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If you ain't smokin' dro, you're smokin' reggie. :shrug:


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Invisiblecaptain.koons
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Re: PH different for veg/flower? [Re: DieselB]
    #407561 - 04/27/10 02:54 PM (6 years, 7 months ago)

Can you mention anyone in particular that grows alternating pH every feeding? I assume this would need to be done in soilless to be practical as hydro you'd be looking at changing the pH every 10days or whatever the case may be and a pH drift of that much for an extended period of time could result in nutrient lockouts/deficiencies. This doesn't seem very practical and I can't see it being effective either. pH of 5.5 makes for the most availability of nutrients.

I don't know what you're asking for? I posted a chart that shows different availability at different pH levels. Some people kick it up to 5.8-5.9 pH for the last few weeks of flowering including the flush. GHSco does this in their videos to make different nutrients more available.


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OfflineDieselB
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Re: PH different for veg/flower? [Re: captain.koons]
    #407590 - 04/27/10 03:51 PM (6 years, 7 months ago)

Yeah, I fucked that one up. I meant 'week', up for one, down for one. No I have nobody in mind, just something I read about years ago when learning about hydro. If I'm not mistaken there's atleast two people on here that grow using alternating Ph's. I'm not gonna name names because I honestly don't remember them, I read this quite a while back too when I was still a lurker.

I've read about sooo many different methods, tips, and tricks over the years that each claims that their the best things and will yield you 50% more or whatever, yadda, yadda..


Yes, I was wondering if you had any links or docs with info relative to changing ph for different stages of flowering etc


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If you ain't smokin' dro, you're smokin' reggie. :shrug:


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Invisiblebrifunforme
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Re: PH different for veg/flower? [Re: DieselB]
    #407607 - 04/27/10 05:12 PM (6 years, 7 months ago)

Thanks for the info captain! Exactly what I was looking for! :smile:
As soon as I am allowed in the rating system I will give ya 5 stars.


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InvisibleHawksresurrection
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Re: PH different for veg/flower? [Re: captain.koons]
    #407621 - 04/27/10 05:48 PM (6 years, 7 months ago)

Great that works for you.  In the years I've been doing DWC I have always kept it at a steady 5.8 and never have nutrient deficiencies.  Great that it works for you.  But it's not the only recommendation.  You say a range, and I say keep it smack in the middle of that range.


As far as soil goes, of course you can go up to 7.  But then your going to increase your chances of getting iron deficiencies.  If you keep your feeding water at a steady 6.5 you will rarely have problems with that. 


As far as the chart goes, was that designed for Marijuana exclusively??  It also really just confirms the values I gave as well.


--------------------
Dude she isn't as young as she use to be.

-niteowl


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Invisiblecaptain.koons
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Re: PH different for veg/flower? [Re: Hawksresurrection]
    #407626 - 04/27/10 06:02 PM (6 years, 7 months ago)

Quote:

hawksapprentice said:
Great that works for you.  In the years I've been doing DWC I have always kept it at a steady 5.8 and never have nutrient deficiencies.  Great that it works for you.  But it's not the only recommendation.  You say a range, and I say keep it smack in the middle of that range.

Simply put I was explaining the pH ranges and the effect. If you have P or Mg deficiencies at 5.8 pH and dropped to 5.5 the problems would be fixed. To say hydro = 5.8 pH and Soil = 6.5pH isn't very accurate as different strains will prefer slightly different environments and require different nutrients. Also being "dead smack in the middle" doesn't mean anything as certain nutrients can be available for say point 5.5 - 5.7 then  just about completely drop off not being available again until 6.0 as seen by potassium

As far as soil goes, of course you can go up to 7.  But then your going to increase your chances of getting iron deficiencies.  If you keep your feeding water at a steady 6.5 you will rarely have problems with that. 

As far as the chart goes, was that designed for Marijuana exclusively??  It also really just confirms the values I gave as well.

It is labeled cannaversity.




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Invisiblecaptain.koons
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Re: PH different for veg/flower? [Re: DieselB]
    #407833 - 04/28/10 12:07 AM (6 years, 7 months ago)

Quote:

DieselB said:
Yeah, I fucked that one up. I meant 'week', up for one, down for one. No I have nobody in mind, just something I read about years ago when learning about hydro. If I'm not mistaken there's atleast two people on here that grow using alternating Ph's. I'm not gonna name names because I honestly don't remember them, I read this quite a while back too when I was still a lurker.

I've read about sooo many different methods, tips, and tricks over the years that each claims that their the best things and will yield you 50% more or whatever, yadda, yadda..


Yes, I was wondering if you had any links or docs with info relative to changing ph for different stages of flowering etc




I've seen numberous logs where people raise their pH for the last few weeks including the flush on icmag. I can't recall any users but im nearly certain they're logs of the coco forum. GreenHouse seed co also does this in their videos for some of their strains I believe I saw it for Arjan's hazes.


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Invisibleboomsaway
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Re: PH different for veg/flower? [Re: captain.koons]
    #408107 - 04/28/10 03:08 PM (6 years, 7 months ago)

i just wanted to post up the pic i found a couple years back of pH ranges.




and of course, the ranges on the pic could be wrong also,

so not to over complicate things, i say, stick with 5.5 haha

EDIT: i also just noticed that that pic u got koons says CEC at the top of the soil ranges, if i were to use a high CEC medium in hydroponics (like say coco), would pH have to be taken into account accordingly?

i mean, if thats the case, how much adjustment would be needed


Edited by boomsaway (04/28/10 03:23 PM)


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Invisiblecaptain.koons
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Re: PH different for veg/flower? [Re: boomsaway]
    #408132 - 04/28/10 03:31 PM (6 years, 7 months ago)

I do unadulterated coco fed pH 5.5

I don't believe that chart is accurate at all for cannabis because at pH 5.5 P and Mg aren't available at all and don't become available until a pH of 5.8


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Invisiblebrifunforme
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Re: PH different for veg/flower? [Re: captain.koons]
    #408154 - 04/28/10 03:45 PM (6 years, 7 months ago)

Quote:

captain.koons said:
I do unadulterated coco fed pH 5.5

I don't believe that chart is accurate at all for cannabis because at pH 5.5 P and Mg aren't available at all and don't become available until a pH of 5.8




Am I reading the chart wrong? The chart reflects that doesn't it? :confused:


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Invisiblecaptain.koons
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Re: PH different for veg/flower? [Re: brifunforme]
    #408172 - 04/28/10 03:59 PM (6 years, 7 months ago)

There's two charts, the first one is the one I believe is accurate. The second one I believe isn't.

My last post was referring to the second chart.


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Invisiblebrifunforme
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Re: PH different for veg/flower? [Re: captain.koons]
    #408235 - 04/28/10 04:55 PM (6 years, 7 months ago)

The second chart shows it becomes available almost right around 5.8 doesnt it?


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Invisiblecaptain.koons
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Re: PH different for veg/flower? [Re: brifunforme]
    #408247 - 04/28/10 05:23 PM (6 years, 7 months ago)

Yes the second chart says P and Mg become available at 5.8 pH which I can't find accurate as I use 5.5 pH and never have deficiencies.


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Cannabis, Marijuana, Ganja & Greens >> Cannabis Cultivation

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