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 Post subject: Help with problem
PostPosted: Sep 12th, '21, 16:13 
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I have 1500lt ft and two 500lt grow beds and been running for three weeks
P.H 7.4
Ammonia .50
Nitrite o
Nitrate 10
I have been feeding plants powerfeed chelate iron
Now half of my plants are starting to yellow, just trying to working what the problem could beImage

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 Post subject: Re: Help with problem
PostPosted: Sep 12th, '21, 17:36 
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Gotta becarefull with iron chelates and feeds ment for the garden. With a PH above 7 most will be locked out and precipitate out. Get the EDHA iron chelate. It's expensive but it last a few years. If i remember correctly one of the iron chelates is poisonous if you add to much. I dont remember which one but i know its the cheap stuff from Furtilom that my local Ace sells.

I am not familiar with your power feed. I am assuming you dont have fish since you are using that. You might be missing some macro nutrients if you arent feeding fish. Seawead extract is a good source for potassium and micro nutrients. I use that when my system is in its infancy (under a year old). Add four table spoon of seaweed extract and two table spoon of EDHA iron chelate. Wait two weeks and apply again. Repeat as necessary until new growth looks good and old growth doesnt get worst.

Some nutrients inside the plants are locked and some are mobile. So your old leafs might not look better. But as long as the new growth looks great and the old growth doesnt get worst then you are good.

Read your label see if it has foliar application. That way you can bypass your systems ph.

With the way your leafs look and age of system its hard for my uneducated eye to really tell. Could be nitrogen, iron or potassium. Iron normally looks like a yellow leafe with deep green veins though but you may have caught it early. Seaweed extract and iron chelate will cover a lot of things plus they are fish safe.

Once my systems get over a year old i rarely have defencies. ImageImageImage

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 Post subject: Re: Help with problem
PostPosted: Sep 12th, '21, 17:38 
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EDTA is the cheap iron chelate that can be poisinous to fish in large amounts. I dont remember the source of that information so take it as here say.

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 Post subject: Re: Help with problem
PostPosted: Sep 12th, '21, 17:56 
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Thank you Rc for the infomation

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 Post subject: Re: Help with problem
PostPosted: Sep 12th, '21, 18:45 
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No problem. Hope it helps get you in the right direction.

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 Post subject: Re: Help with problem
PostPosted: Sep 14th, '21, 06:31 
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If you're adding Iron,it's not going to be an Iron deficiency.

It's heat stress or Magnesium deficiency.

Where is the yellowing? top of the plant or lower.
What plant is it & what is the temperatures,air & water?

With that PH reading (being high),it could be a Mag deficiency because of the Calcium in the water.

When the water temperature gets warm,kale & basil does that in my system & it looks just like a Magnesium deficiency.

Could you post a pic of the whole plant or all of the plants so we can have a good look.

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 Post subject: Re: Help with problem
PostPosted: Sep 17th, '21, 01:39 
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7341 wrote:
If you're adding Iron,it's not going to be an Iron deficiency.

It's heat stress or Magnesium deficiency.

Where is the yellowing? top of the plant or lower.
What plant is it & what is the temperatures,air & water?

With that PH reading (being high),it could be a Mag deficiency because of the Calcium in the water.

When the water temperature gets warm,kale & basil does that in my system & it looks just like a Magnesium deficiency.

Could you post a pic of the whole plant or all of the plants so we can have a good look.



i have used magnesium about 4 days ago as well, the plants seem to bee improving
The new growth has better color to it now


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 Post subject: Re: Help with problem
PostPosted: Sep 17th, '21, 02:20 
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Nice. That looks way better.

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 Post subject: Re: Help with problem
PostPosted: Sep 17th, '21, 02:35 
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:D They are looking good a bit of a relief

Thank you everyone for all the information to help out


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 Post subject: Re: Help with problem
PostPosted: Sep 20th, '21, 21:32 
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See that little leaf in the middle of the plant (1.PNG)?,if it was an Iron deficiency that leaf would look like the leaf in the first pic you posted.
But yeah it looks good.

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 Post subject: Re: Help with problem
PostPosted: Sep 22nd, '21, 02:37 
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:D
7341 wrote:
See that little leaf in the middle of the plant (1.PNG)?,if it was an Iron deficiency that leaf would look like the leaf in the first pic you posted.
But yeah it looks good.


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