Serious pH issues?!

J

Justin DAngelo

Member
Hello all, I have another serious issue, I have read hours of posts and tips and just plain stuff all over on pH...what it is, how to raise/lower and monitor it. I have been having an issue with, what has to be, my soil-less mix. I am using the Humbolt pre-made mix. I am using the growell micronutes. It says it consists 60-70 percent spagnum peat moss, perlite, dolomitic lime, and yucca extract. I was putting in 6.0 pH nute solution, but it the runoff was as low as 4.7 5 days ago. I test after I add the nutes to the water. I gradually adjusted my nute solution to 7.0 over a period of days and the runoff is now only 5.3!!

Do I need to repot my 4 weeks into flowering female and add more dolomitic lime to the mix? Should I add hydrated lime to my nute solution? Baking soda? The pH up isn't changing the runoff. I'm at wits end and the plant is borderline in a coma. I have a liquid pH and a soil pH tester as well. I need some advice please and thanks.

The close up pic is of my vegging crop that is exhibiting signs of distress as well. Just 1 or two leaves on each one with just the tips turning yellow.
 

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asaph

asaph

Well-Known Member
Justin DAngelo said:
Hello all, I have another serious issue, I have read hours of posts and tips and just plain stuff all over on pH...what it is, how to raise/lower and monitor it. I have been having an issue with, what has to be, my soil-less mix. I am using the Humbolt pre-made mix. I am using the growell micronutes. It says it consists 60-70 percent spagnum peat moss, perlite, dolomitic lime, and yucca extract. I was putting in 6.0 pH nute solution, but it the runoff was as low as 4.7 5 days ago. I test after I add the nutes to the water. I gradually adjusted my nute solution to 7.0 over a period of days and the runoff is now only 5.3!!

Do I need to repot my 4 weeks into flowering female and add more dolomitic lime to the mix? Should I add hydrated lime to my nute solution? Baking soda? The pH up isn't changing the runoff. I'm at wits end and the plant is borderline in a coma. I have a liquid pH and a soil pH tester as well. I need some advice please and thanks.

The close up pic is of my vegging crop that is exhibiting signs of distress as well. Just 1 or two leaves on each one with just the tips turning yellow.
Click to expand...
i've also had soil pH problems, from the other end... too basic. You say that when you put 7ph water there the runoff improves to 5.3. that's good - do that a few more times and see if it gradually improves. If not, I don't know what you can do. Next time though, grow in coco, it is much better on pH buffering I believe
 
jawbrodt

jawbrodt

Well-Known Member
You can flush it with water at 7.0, til the runoff comes out at 7.0, then pour in some water mixed with lime(1-2 tbsp per gallon), til you get cloudy water coming out the bottom of your pots. That'll hold your PH til your done flowering.
 
jawbrodt

jawbrodt

Well-Known Member
P.S. You can also feed them along with that last dose of limed-water, if they are in need, just mix the ferts in with it.
 
bryon209

bryon209

Active Member
do not repot!!! you are in the middle of flower.....if you acid levels are incorrect it probly lies with te premix...did you soak your medium?any way repot now and you will have shite
 
P

pH'

Member
If your pH is that low in the medium something is wrong because to balance it out you'd need to raise the pH of your solution to like 8+ (just a guess). I'd call the maker of that pre made medium and ask them what the pH of that product is.
 
J

Justin DAngelo

Member
The soil tester is saying the pH is 6.0. The runoff is still coming out at 5.3 even with added calcium/magnesium additive and pH up. I did do a flush as well when I first diagnosed the issue and checked for any root problems. Should I use the dry dolomitic lime or the hydrated? Is hydrated is supposed to be easier to use in a fix because I'm able to add it to the nute solution? I will take some initiative even though it's not significantly worse over the course of this week. Thanks for the advice and future help.
 
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