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A Question Of Ph

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A Question Of Ph

kbellfoy 17 Replies 1,094 Views
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kbellfoy

kbellfoy

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#1
I'm in a peat based potting mix and I try and keep my ph between 6-7. Iv just seen this chart of a thread off Logic and I'm confused now. The chart is for peat based media. If I'm reading it correct (which I may not be) then I'm keeping my ph too high by far. Is this why iv been plagued with problems? 5.6-5.8 seems to be optimum? I thought that was ph levels for hydro.
 

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#2
Amendments are significant, what might be buffering the media, plus environment is huge for root growth. A desireable environment encourages More roots which gives plant more help with ph. I've noticed a higher ph when I check media near a ton of roots. Just putting it out there for discussion.
 
#3
kbellfoy said:
I'm in a peat based potting mix and I try and keep my ph between 6-7. Iv just seen this chart of a thread off Logic and I'm confused now. The chart is for peat based media. If I'm reading it correct (which I may not be) then I'm keeping my ph too high by far. Is this why iv been plagued with problems? 5.6-5.8 seems to be optimum? I thought that was ph levels for hydro.
Click to expand...
Yes, if you're running a peat-based media, you need to shift the pH ranges lower. I personally haven't done a whole lot of peat-based growing, nothing beyond seedling mix, really. But that is my understanding of it. I've done perlite hempy tubs, they were perfect at 5.0-5.5. Until the RAs hit! :o
 
#5
Hehehe what a noob I am lol iv been at 6.5 and 6.8. Tell u what it ain't half a learning curve growing this. Iv bought all kinds of crap I don't need. I am so keeping it simple next run. I think I'm getting my next seeds from mandala genetics. Suppose to have some great old time genetics in their line up. Also they recommend light if not no feeding thru out a grow if put in good soil. Sounds a lot simpler. Thanks everyone for your comments
 
#6
i try to stay as close to 5.8 to 6.2 but i will use a mix if it reads 6.5.i will not use a mix if it reads 5.6,i would ph up to 6.0 and splash n dash :)
 
#8
Bannacis said:
I run my peat based medium from 6.0-6.5. heavy on perlite and a good tlo mixture. it takes care of it self, raising and lowering ph as plant needs it.
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A rising ph is healthy and an unhealthy plant will become more and more acidic, I mean, in general, you know.
 
#9
Mines been more 6.8 and iv had a LOT of lock out issues. Iv just re potted in fresh media and ph is now 6.0 I'm hoping I haven't pushed my luck as they are 33 days in flower.
 
#10
Thank u for your comment epitome. I shall remember that.
 
#11
kbellfoy said:
Mines been more 6.8 and iv had a LOT of lock out issues. Iv just re potted in fresh media and ph is now 6.0 I'm hoping I haven't pushed my luck as they are 33 days in flower.
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How did the roots look during your up pot? Have you Re potted half way through flowering before? I have had bud luck doing it and would love to see someone successfully recoup loss momentum that late in the phase...
 
#12
Here are some bud pics before I up potted. I have deffo noticed the yellowing has halted a LOT since and ph is better. The roots were lovely and fibrous. Growing out the side of the fabric pots. I checked for any pests but none there thank god. They wre in 3.5 gal pots and tbh I think they were exhausted. I also had a lot of dry pockets despite watering well so I gently moved the soil around to help get rid of these. These are AK 47 by serious seeds. They have been indestructible which they are known for. They smell very strong and are coated in sugar and very very sticky. Few more weeks to go yet.
Screenshot 2015 09 02 07 17 30
Screenshot 2015 09 02 07 17 09
 
#15
in soil, the ph in the rhizosphere is usually very different, than the ph of the nutrient solution. the roots
excrete many substances that alter the ph in the substrate. the plant itself strives to maintain neutrality between
cations and anions. for every cation the plant takes up, the plant excretes a cation as a H+. PH does not have a direct effect on the plant
but rather directly affects the availability of nutrients. root exudiates liberate nutrients via the dissolution of insoluable mineral phases
as they are released into the soil to be uptaken by the plant... just alittle information here. Ph is very complex and more so in non soil
applications.
 
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