Weird yellow leaves

Hello there!

So im having 2 ak47 and a week ago this started happening to one of them,yellow young leaves and it seems to affect the new growth as well,i hope the photos will help you!

Indoors
2 months in Veg
I dont feed them any nuts because i just transplanted em to new medium(11lt) with fresh soil and nuts in it(30.11.16).
Watering every 3-4 days at 6.3 PH
Temp:20°C day and night
Light:24/7

Its my second try in growing so yeah...Thanks a lot guys!

Oh i dont know if it matters ,i think it dosnt but i got 2 clones from them at 22.11.16

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

I would also put your lights to 18 hours

damn,i thought 6.3 for veg was fine

bagg0s said:

damn,i thought 6.3 for veg was fine

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I don't see a problem. Young growth is always lighter. Don't change your ph. I run my lights 24/7 without any problems. My outdoor plants grown in organic soil get 8.0 ph from the tap and they do fine. Depending on what kind of medium you have you may need to ph adjust the water. This chart is soil vs hydro Soilless mediums tend to get fussy if the water ph gets above 6.5.

Cyco Nigel said:

I would also put your lights to 18 hours

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Are you trying to sell something?

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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Good for hydro but op isn't growing hydro.

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.

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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New growth is almost always lighter especially when you have rapid growth. I cant see a problem from the current pictures. You just transplanted them so you can rule out root bound.

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....

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....

Click to expand...

I cant see it. I am red green blind.

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....

Click to expand...

Yeah sure i will add some micros,and yes based on that chart 6.5 is slighty better i ll fix it.

My soil is synthetic yes for young plants,2-1-1 n-p-k if i remember correctly because i dont have the bag and the mediums are 11 LT plastic

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

Cal mag 5ml a gallon....next question

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...

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

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...

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

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...

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!

XxDanxX said:

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

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

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?

Click to expand...

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!

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!

Click to expand...

QUOTE="Dr. Who, post: 13189784, member: 378146"]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![/QUOTE]
Sorry I thought it posted, I'm posting it now I tried to post a video that's might be why, here are some pictures

Anyone have any ideas why my leaves mainly around the huds are yellowing more towards the middle, I do have minor nute burn, but I think this might be something else

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!

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!

Click to expand...

So the yellowing in the middle of the lead is still the minor mute burn (easy to see in picture #3)