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Offlineshrogrow
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Registered: 09/03/09
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A little help with pH. Now with pH-poll!
    #276971 - 09/08/09 03:49 AM (7 years, 2 months ago)

I've grown my 11 days old seedlings in soil with an initial pH of 6.5 and watered them with water with a pH of 8.2. After a couple of days, one of my seedlings stalled in growth, this one was in a very small pot, so my guess is that this happened because the pH buffer in the soil was depleted after a couple of days with pH 8.2 water. Anyhow, I've now got a pH-meter (didn't know the water was that alkaline before yesterday) and I've just watered my plants with pH 6.4 water. I checked the run off water and it ended up 6.4 in one and 6.3 in the other. My question is, does this ensure that the soil is now 6.3-6.4? And if i continue to water with 6.5ich, will the soil end up with that pH, or will I have to measure the pH every time I water to balance it up at 6.5?

I use lemon concentrate to lower the pH, but I see many people here using pH-up/down which I guess they buy in garden stores for a lot of $$$ compared to lemon concentrate(?). Is there any reason to use these specialized products? Is there anything in the lemon concentrate that I might not want to water my plants with perhaps? It contains water, lemon juice and citrus acid - nothing else.

Also, could someone confirm that 6.5 is the pH I want in soil.


This pictures seems to say that 6.5 is the sweet spot, but it seems that if it just gets a little more acidic I'll lose out on P, Ca and Mg. So maybe it's safer to play it at above 6.5 (6.7 perhaps?).

Actually, I'll add a poll here, never done that before, should be fun :smile:
What pH do you aim to keep your soil at?
You may choose only one
Over 6.8
6.8
6.7
6.6
6.5
6.4
6.3
Under 6.3


Votes accepted from (09/08/09 03:47 AM) to (No end specified)
View the results of this poll



Edited by shrogrow (09/08/09 05:23 AM)


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InvisibleMagashM
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Re: A little help with pH. Now with pH-poll! [Re: shrogrow]
    #276990 - 09/08/09 07:22 AM (7 years, 2 months ago)

If your using a ph pen they suck anyway and none are accurate to the point. Keep the ph between 6.5 and 7 and you'll be fine.



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InvisibleDr. SiekadellykM
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Re: A little help with pH. Now with pH-poll! [Re: Magash]
    #277016 - 09/08/09 10:36 AM (7 years, 2 months ago)

Quote:

Keep the ph between 6.5 and 7 and you'll be fine



Yes, thats the ideal PH for soil.


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InvisibleHarry_Ba11sachM
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Re: A little help with pH. Now with pH-poll! [Re: shrogrow]
    #277028 - 09/08/09 11:04 AM (7 years, 2 months ago)

it's pretty much impossible to keep the soil at exactly 6.5 for the entirety of a grow. just try to keep it in a reasonable range and you'll do well.


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InvisibleDoPeYsMuRf

Registered: 08/14/09
Posts: 645
Re: A little help with pH. Now with pH-poll! [Re: Magash]
    #277264 - 09/08/09 07:24 PM (7 years, 2 months ago)

What if you where just starting the seeds. Is pH 6.0 to low if I plan on putting them in soil eventually.(Should I just use the distilled water I bought from hy-vee without adjusting the pH at all?)

I think I'm just worried becuse the last seeds I started where 3 years old and didn't sprout. I just bought seeds and I keep looking back at my last attempt...

Sorry to thread jack but it is a pH question =(


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InvisibleFurrowedBrowM
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Re: A little help with pH. Now with pH-poll! [Re: DoPeYsMuRf]
    #277291 - 09/08/09 08:55 PM (7 years, 2 months ago)

Hydroponic pH requirements are less (more acidic) than what is required for soil grows.  5.5 - 6.1 as illustrated in the picture the OP posted.  I don't know what to recommend when it comes to germination.  I usually germinate in distilled h20 then ph adjust down to like 5.8 or 6 when I put them in the rockwool cubes.  That's what i've done and it's worked fine.


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Cannabis, Marijuana, Ganja & Greens >> Cannabis Cultivation

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