How Much Is Too Much CalMag?

[Kilbarrog]

This looks like N lockout to me. I'm not familiar with those nutes but looks like a lot. Are you giving plain water between feedings?

Thanks for the reply

Biobizz says to use nutes with every feed because if you use plain water, you are disturbing the soils ph etc.... But they are getting plenty of Nitrogen. Well, I'm following the Biobizz feeding schedule. So I assume they are.

But I don't understand how the 1 plant looks fine & it gets the exact same feed?

 

[Lil Dab]

Thanks for the reply

Biobizz says to use nutes with every feed because if you use plain water, you are disturbing the soils ph etc.... But they are getting plenty of Nitrogen. Well, I'm following the Biobizz feeding schedule. So I assume they are.

But I don't understand how the 1 plant looks fine & it gets the exact same feed?

Doesn’t matter how much N they are getting if it’s a lock out issue. I get bio bizz suggestions feed every watering but that is a peat based media which hold on to nutrients.

Or like someone else has said maybe a watering issue if they don’t have water they can’t uptake nutrients. Which might explain why the little one is fine she requires much less water

 

[JP1]

N lockout doesn't really have anything to do with the amount of N. It's caused my too much of something else that stops the plant from absorbing the nitrogen

 

[Kilbarrog]

N lockout doesn't really have anything to do with the amount of N. It's caused my too much of something else that stops the plant from absorbing the nitrogen

I'm lost
Thanks for your help

 

[JP1]

I'm lost
Thanks for your help

Do you know your soil pH? Are you phing your feed?

 

[Kilbarrog]

Not my soil, but I ph their feed & it's always 7ph & the soil is supposed to bring it down to 6.5
I also water them to run off since I'm giving them Advanced Nutrients

 

[JP1]

What are you using for soil? Promix?

 

[Kilbarrog]

What are you using for soil? Promix?

I'm using Biobizz Light Mix in 6.5 litre plastic pots

 

[JP1]

I'm gonna say your pH is high and it's throwing you off. Even if the soil buffers itself down to 6.5, that's still at the high end. Tagging in @Mañ'O'Green , he'll know

 

[Mañ'O'Green]

Well it looks like a case of too much too much K - potassium and maybe just too much of everything? Were you stoned when you measured the P-K booster? That nutrient schedule seems a bit strong?




There is another potential issue that I have not witnessed but deserves a look HLVd I think the sudden fall of so many plants at one time is suspicious but then I am high so there is that.