Grow Room Wollkopf's Mephisto micro grow

@Mr. Sparkle yeah the difference between pictures can help you so much!


During the last 3 days the leaves of the deep blue C started yellowing. I checked the ph values of my runoff and it seems fine. Water going in is at 6.5 water going out is at 6.3. I still feed them bio grow so they should get (enough) nitrogen.

I probably wouldn't worry if I wouldn't see the comparison to the Sour Crack.
The Deep blue C is at day 46 and should go 65-75 days. So almost a month longer...
The Sour Crack is on day 48 and shows only slightly yellow leaves. It should go 55 to 65 days.

I'm now a little bit worried, cause I don't know why the DBC is getting yellow so early and the SC doesn't.
What do you guys think?

Left is the DBC, right SC
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Whats you EC ? looks a little sporadic but only affecting the older fan leaves so not that bad, and really only two to three weeks left so they will make it so long as you don't have a full lock out.
Just got an ec-meter from a friend. Going to check it tomorrow. How should I do it? Only the ec of my water with nutes or the run off or both? In which range should the ec be?
 
Do both, it will tell you some what of whats happening, typical nutrient water can range from 0.8 to 1.6 ec depending on your conditions and how often you water, your run off should be equal to or less that what you put it, if its higher it means your plants are not using everything they are given and you are creating a build up situation in your soil/mix, aka over feeding
 
Do both, it will tell you some what of whats happening, typical nutrient water can range from 0.8 to 1.6 ec depending on your conditions and how often you water, your run off should be equal to or less that what you put it, if its higher it means your plants are not using everything they are given and you are creating a build up situation in your soil/mix, aka over feeding
I just checked the ec and I think I overfed the DBC. Ec going in is at 0.95 and the ec going out is 1.4. But only the DBC. The Sour Crack is fed exactly the same nutes and the runoff is at 0.85. Funny how different plants are.

@Mr. Sparkle What do you suggest should I do? Flush with pHed water and then start giving mild nutes?

Edit: I once was told by a friend that it is not/nearly not possible to overfeed with organic nutes. What is yout opinion...
I´m using:
Biobizz Grow
Biobizz Bloom
Biobizz TopMax
organic CalMag, don´t know the brand...
 
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just feed it only water a couple times and youll be fine, heck you already are 1.4 isn't bad at all, i feed at that concentration, and im on the lower side compared to others.

And you can totally overfeed with organic nutrients, its no different, just easier to do with chemical cause you need very little in comparison, due to concentration
 
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