AK-48 & master kush 400w HPS Grow

Those plants looks crazy. you can tell they are going to be crazy when they start to flower

ok RIU i need some help identifying a problem. I went to check on my plants when the ligts turned on and this is what I found. Yellowing spots on most of the plants. Doesnt look like nute burn so I'm not sure what it can be. The water I use is usually a PH of 6.5 - 7. Anyone have an idea of what this could be?

SteveDaSavage said:

ok RIU i need some help identifying a problem. I went to check on my plants when the ligts turned on and this is what I found. Yellowing spots on most of the plants. Doesnt look like nute burn so I'm not sure what it can be. The water I use is usually a PH of 6.5 - 7. Anyone have an idea of what this could be?
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If your not over watering with nutes then check your water and soil PH bro

Here's some helpful info I got from another good forum

The wrong PH can cause your plants to mimic the look of nute deficiency, because the wrong PH balance causes plants to have a harder time utilizing the nutrients ie (Nute lockout)

What is pH, and what do the terms acidic and alkaline mean?
The acidity or alkalinity of the soil is measured by pH (potential Hydrogen ions). Basically it's a measure of the amount of lime (calcium) contained in your soil, and the type of soil that you have. A soil with a pH lower than 7.0 is an acidic soil and one with a pH higher than 7.0 is considered to be alkaline. A pH of 7.0 is neutral.

Adjusting your soil pH:
Once you have determined the pH of your soil with a good tester, you can amend the soil if needed to accommodate the plants in your garden using inexpensive materials commonly available at your local garden center.

* Adjust soil pH slowly over several days time, and check pH often as you go. Radical changes in pH may cause osmotic shock damage to the roots.

Raising soil pH: (to make it more alkaline)
It is generally easier to make soil mixes more alkaline than it is to make them more acidic. The addition of dolomite lime, hardwood ash, bone meal, crushed marble, or crushed oyster shells will help to raise the soil pH.

Lowering soil pH: (to make it more acidic)
If your soil needs to be more acidic, sawdust, composted leaves, wood chips, cottonseed meal, leaf mold and especially peat moss, will lower the soil pH.

Hope this helps!


ALso of note. I found an interesting way to test your soil without purchasing a meter or ph test kit

Take some soil in a clear container and pour vinegar (1/2 cup) in the cup, if it fizzes then your soil is alkaline

Take some soil in a container and add some water (1/2 cup) to it. Pour some baking soda (1/2 cup) into the container, if it fizzes then your soil is acidic

If you don't get any fizz from either tests then your soil is sitting pretty neutral (which is a good thing)

Mudslide9791 said:

Here's some helpful info I got from another good forum

The wrong PH can cause your plants to mimic the look of nute deficiency, because the wrong PH balance causes plants to have a harder time utilizing the nutrients ie (Nute lockout)

What is pH, and what do the terms acidic and alkaline mean?
The acidity or alkalinity of the soil is measured by pH (potential Hydrogen ions). Basically it's a measure of the amount of lime (calcium) contained in your soil, and the type of soil that you have. A soil with a pH lower than 7.0 is an acidic soil and one with a pH higher than 7.0 is considered to be alkaline. A pH of 7.0 is neutral.

Adjusting your soil pH:
Once you have determined the pH of your soil with a good tester, you can amend the soil if needed to accommodate the plants in your garden using inexpensive materials commonly available at your local garden center.

* Adjust soil pH slowly over several days time, and check pH often as you go. Radical changes in pH may cause osmotic shock damage to the roots.

Raising soil pH: (to make it more alkaline)
It is generally easier to make soil mixes more alkaline than it is to make them more acidic. The addition of dolomite lime, hardwood ash, bone meal, crushed marble, or crushed oyster shells will help to raise the soil pH.

Lowering soil pH: (to make it more acidic)
If your soil needs to be more acidic, sawdust, composted leaves, wood chips, cottonseed meal, leaf mold and especially peat moss, will lower the soil pH.

Hope this helps!


ALso of note. I found an interesting way to test your soil without purchasing a meter or ph test kit

Take some soil in a clear container and pour vinegar (1/2 cup) in the cup, if it fizzes then your soil is alkaline

Take some soil in a container and add some water (1/2 cup) to it. Pour some baking soda (1/2 cup) into the container, if it fizzes then your soil is acidic

If you don't get any fizz from either tests then your soil is sitting pretty neutral (which is a good thing)

Click to expand...

THanks for the response man

Mudslide9791 said:

Here's some helpful info I got from another good forum

The wrong PH can cause your plants to mimic the look of nute deficiency, because the wrong PH balance causes plants to have a harder time utilizing the nutrients ie (Nute lockout)

What is pH, and what do the terms acidic and alkaline mean?
The acidity or alkalinity of the soil is measured by pH (potential Hydrogen ions). Basically it's a measure of the amount of lime (calcium) contained in your soil, and the type of soil that you have. A soil with a pH lower than 7.0 is an acidic soil and one with a pH higher than 7.0 is considered to be alkaline. A pH of 7.0 is neutral.

Adjusting your soil pH:
Once you have determined the pH of your soil with a good tester, you can amend the soil if needed to accommodate the plants in your garden using inexpensive materials commonly available at your local garden center.

* Adjust soil pH slowly over several days time, and check pH often as you go. Radical changes in pH may cause osmotic shock damage to the roots.

Raising soil pH: (to make it more alkaline)
It is generally easier to make soil mixes more alkaline than it is to make them more acidic. The addition of dolomite lime, hardwood ash, bone meal, crushed marble, or crushed oyster shells will help to raise the soil pH.

Lowering soil pH: (to make it more acidic)
If your soil needs to be more acidic, sawdust, composted leaves, wood chips, cottonseed meal, leaf mold and especially peat moss, will lower the soil pH.

Hope this helps!


ALso of note. I found an interesting way to test your soil without purchasing a meter or ph test kit

Take some soil in a clear container and pour vinegar (1/2 cup) in the cup, if it fizzes then your soil is alkaline

Take some soil in a container and add some water (1/2 cup) to it. Pour some baking soda (1/2 cup) into the container, if it fizzes then your soil is acidic

If you don't get any fizz from either tests then your soil is sitting pretty neutral (which is a good thing)

Click to expand...

I did that test just now and the soil had a slight reaction to the vinegar.

Plants are not looking so good today. Will post some updated pics later.

ok here are some updated pics. I did a semi flush more like a heavy watering with fresh PHed water. Only had 2 gallons of PHed water. My babies are looking over watered and sad. Hopefully someone can help me out with this and I can figure out what the problem is. These pics are of the plant that looked the worst.

I wanted to switch them over to 12/12 on Oct 31st. Do you think I should wait now that I ran into this problem??

Hey man I was looking over your grow and I have to ask what kind of water are u using . I,m asking because u have not mentioned unless I missed it but mabey your being led the wrong way . If your sure the ph is right u might be having a cal/mag problem.

yes it does look like maybe a cal/mag problem but did you mix any dolomite lime in your soil mix?

kingofqueen said:

Hey man I was looking over your grow and I have to ask what kind of water are u using . I,m asking because u have not mentioned unless I missed it but mabey your being led the wrong way . If your sure the ph is right u might be having a cal/mag problem.

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Im using tap water that I leave out about 48 hours before using. I test the PH before I use it. the ph is always around 6.5

KillaGreenBuds said:

yes it does look like maybe a cal/mag problem but did you mix any dolomite lime in your soil mix?

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No Im using Fox farms ocean forest mixed with some perlite thats all.

So far everyone is leaning toward cal/mag deficiency. So what should I do? What should I add?

I checked on the plants today looking a lil better after the fresh water. New growth looks a lil deformed and light in color. Updated pics later

Here are some updated pics. I see a lot of new growth but the new growth is deformed. Leaves are coming in curved and some twisting upside down. Please ppl help me out what could this be??

to me your plants look fine, you should wait a bit to see if your plant just repairs itself,

Noobie101 said:

to me your plants look fine, you should wait a bit to see if your plant just repairs itself,

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I just want them to be as healthy as possible and get a nice yeild.

Lots of new pics. Some better pics to give an idea of whats going on.

Anyone? I know you guys are looking!! Come on help a fellow farmer out