Weird yellow leaves

bagg0s said:

damn,i thought 6.3 for veg was fine

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Cyco Nigel said:

I would also put your lights to 18 hours

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Cyco Nigel said:

I can say that your p.h is to high you should have it around 5.8 or 6 at the most.

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bagg0s said:

thanks a lot pecker,this chart is useful indeed!
Any ideas why the leaves has taken this light green-yellow color?at first i thought it was iron or sulfur deficiency but their sickness progress from the inside of the leaf not from the tips as iron-sulfur deficiency does,and the veins are still green!
Her sisters leaves are green as they supposed to be.

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Dr. Who said:

Uh, Doc.....He's off on his pH and he IS getting a Fe or low iron starting to show in one plant!

Synthetic's ??? All in-going to 6.5 in veg and 6.7 in bloom....If that's organic and/or you built that soil....bet you forgot a cpl of things you needed.

What is that media?

Add a kelp extract at 5ml per gallon for the micro's lacking....

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Dr. Who said:

Uh, Doc.....He's off on his pH and he IS getting a Fe or low iron starting to show in one plant!

Synthetic's ??? All in-going to 6.5 in veg and 6.7 in bloom....If that's organic and/or you built that soil....bet you forgot a cpl of things you needed.

What is that media?

Add a kelp extract at 5ml per gallon for the micro's lacking....

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• between 5.5 and 5.8 perfect
• between 5.3 and 6.5 good
• between 5.0 and 7.0 acceptable
• below 4.5 and above 8.0 disrupted absorption of nutrients
• below 3.5 and above 9.0 irreversible damage to the roots

Cyco Nigel said:

The correct acidity of the growth medium, fertilizers and water is very important. The acidity level determines the quality of the bacterial life, and the metabolic rate of the marijuana plant. Bacteria, which are important for the conversion of fertilizer to absorbable substances thrive best in a neutral environment, which means a pH level of 7.

The pH is a measure of the acidity concentration in a solution, the acronym stands for ‘Potentia Hydrogenii’. In fact, it is the ratio of negatively and positively charged water ions. The acidity is determined by the number of positively charged ions. A liquid is neutral when the number of positively and negatively charged particles keep each other balanced. When certain substances are added, this acidity balance can go either to the acid or the alkaline side. The pH level of a solution is nothing more than the concentration of positively charged ions in that substance.

These positively charged particles are expressed on a pH scale, which ranges from 0 (acid) to 14 (alkaline). A liquid with a pH level of 7 is called neutral; non acidic and non alkaline. This scale is logarithmic. In other words: if the pH level changes with one point, the liquid is more acidic or more alkaline with a factor of 10. Compared with a neutral liquid (pH 7), a solution with a pH level of 6 is 10 times more acidic, and a pH level of 5 is a hundred times more acidic! When mixing acids and salts you have to be very careful how much you add, it can be too much very quickly. This article is part of the e-Book ” The Marijuana Grow Bible”. Make sure to download it for free at this link here.


Trace elements, which the marijuana plant needs to a some degree, are bound in water with a higher pH level and can no longer be absorbed by the plant. What’s good for one thing, like the roots, is less suitable for the other, like the trace elements. So it’s finding a pH level that’s acceptable for all participants. It’s best to work with water and nutrient solutions that are slightly acidic, with a pH between 5.5 and 6.5. The level can be a half a point higher in the slabs.

pH levels

• between 5.5 and 5.8 perfect
• between 5.3 and 6.5 good
• between 5.0 and 7.0 acceptable
• below 4.5 and above 8.0 disrupted absorption of nutrients
• below 3.5 and above 9.0 irreversible damage to the roots

Click to expand...

Cyco Nigel said:

The correct acidity of the growth medium, fertilizers and water is very important. The acidity level determines the quality of the bacterial life, and the metabolic rate of the marijuana plant. Bacteria, which are important for the conversion of fertilizer to absorbable substances thrive best in a neutral environment, which means a pH level of 7.

The pH is a measure of the acidity concentration in a solution, the acronym stands for ‘Potentia Hydrogenii’. In fact, it is the ratio of negatively and positively charged water ions. The acidity is determined by the number of positively charged ions. A liquid is neutral when the number of positively and negatively charged particles keep each other balanced. When certain substances are added, this acidity balance can go either to the acid or the alkaline side. The pH level of a solution is nothing more than the concentration of positively charged ions in that substance.

These positively charged particles are expressed on a pH scale, which ranges from 0 (acid) to 14 (alkaline). A liquid with a pH level of 7 is called neutral; non acidic and non alkaline. This scale is logarithmic. In other words: if the pH level changes with one point, the liquid is more acidic or more alkaline with a factor of 10. Compared with a neutral liquid (pH 7), a solution with a pH level of 6 is 10 times more acidic, and a pH level of 5 is a hundred times more acidic! When mixing acids and salts you have to be very careful how much you add, it can be too much very quickly. This article is part of the e-Book ” The Marijuana Grow Bible”. Make sure to download it for free at this link here.


Trace elements, which the marijuana plant needs to a some degree, are bound in water with a higher pH level and can no longer be absorbed by the plant. What’s good for one thing, like the roots, is less suitable for the other, like the trace elements. So it’s finding a pH level that’s acceptable for all participants. It’s best to work with water and nutrient solutions that are slightly acidic, with a pH between 5.5 and 6.5. The level can be a half a point higher in the slabs.

pH levels

• between 5.5 and 5.8 perfect
• between 5.3 and 6.5 good
• between 5.0 and 7.0 acceptable
• below 4.5 and above 8.0 disrupted absorption of nutrients
• below 3.5 and above 9.0 irreversible damage to the roots

Click to expand...

Cyco Nigel said:

I can say that your p.h is to high you should have it around 5.8 or 6 at the most.

Click to expand...

Cyco Nigel said:

The correct acidity of the growth medium, fertilizers and water is very important. The acidity level determines the quality of the bacterial life, and the metabolic rate of the marijuana plant. Bacteria, which are important for the conversion of fertilizer to absorbable substances thrive best in a neutral environment, which means a pH level of 7.

The pH is a measure of the acidity concentration in a solution, the acronym stands for ‘Potentia Hydrogenii’. In fact, it is the ratio of negatively and positively charged water ions. The acidity is determined by the number of positively charged ions. A liquid is neutral when the number of positively and negatively charged particles keep each other balanced. When certain substances are added, this acidity balance can go either to the acid or the alkaline side. The pH level of a solution is nothing more than the concentration of positively charged ions in that substance.

These positively charged particles are expressed on a pH scale, which ranges from 0 (acid) to 14 (alkaline). A liquid with a pH level of 7 is called neutral; non acidic and non alkaline. This scale is logarithmic. In other words: if the pH level changes with one point, the liquid is more acidic or more alkaline with a factor of 10. Compared with a neutral liquid (pH 7), a solution with a pH level of 6 is 10 times more acidic, and a pH level of 5 is a hundred times more acidic! When mixing acids and salts you have to be very careful how much you add, it can be too much very quickly. This article is part of the e-Book ” The Marijuana Grow Bible”. Make sure to download it for free at this link here.


Trace elements, which the marijuana plant needs to a some degree, are bound in water with a higher pH level and can no longer be absorbed by the plant. What’s good for one thing, like the roots, is less suitable for the other, like the trace elements. So it’s finding a pH level that’s acceptable for all participants. It’s best to work with water and nutrient solutions that are slightly acidic, with a pH between 5.5 and 6.5. The level can be a half a point higher in the slabs.

pH levels

• between 5.5 and 5.8 perfect
• between 5.3 and 6.5 good
• between 5.0 and 7.0 acceptable
• below 4.5 and above 8.0 disrupted absorption of nutrients
• below 3.5 and above 9.0 irreversible damage to the roots

Click to expand...

XxDanxX said:

My leaves are showing some wired yellowing, can you diagnose the issue I'm posting a video

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bagg0s said:

Very helpful,thanks i understand it better now,u agree on what r.i.kid said?an extra 5 ml cal mag per gallon?

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Dr. Who said:

How nice! Another know it all nutrient rep!

He's IN soil !! If you run under 6.5,, you asking for trouble fast! Your quoting hydro pH values! Not only that but staying between 5.5 and 5.8 will cause a low pH issue with hydro and you'll be getting low P,Ca and Mn soon!

I suggest politely that you go back to advertising!
Read some more of that book and then maybe Mr. Rosenthals and Mr. Greens.....Jorge's book has many other "not exactly correct" instructions in it! ..selling seems a better fit for you!


You'll do better to just post it or ask someone else!


Please read my whole post and understand TRUTH - And r.i.kid is flat out wrong - it's not a Ca issue at all!

and people ask why I don't come in this topic much anymore! pH soil to no higher then 6 and it's Cal....good grief!

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Dr. Who said:

It's still a micro nute problem (from what I can limited - see). That generally points to a pH problem...(Hard to call though! Next time use normal lighting to take the pics in!)
Add a kelp extract to your feed - 5ml per gal and be sure your in-going is pH'ed to 6.5....The leaves will not show any repair! Only N problems will correct or recover in leaves showing it.

Your close. Take a deep breath.....do the kelp and the pH thing and calm down.....It will finish out with NO major problems.....I wish most people had your minor issue over most things I see here!

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