RookieMuffin
Well-Known Member
Hello I have the following problem.
One of my seedling started to develop these yellow spots. I didn't worry because I wasn't feeding enough based on the nutrient schedule of my fertilizer bottle. I was feeding the "first Root"-strength but already had some true leaves on them so I checked the bottle again and changed the resevoir and fed my plants the amount stated on the fertilizer bottle for plants with first true leaves.
The other seedlings who did not develop the yellow spots were fine with the new nutrient solution and higher EC. But the one with the yellow leaves was stunt and the nutrient EC of her reservoir kept raising a lot (about +0.6EC) so I lowered it again and the next day it has risen again (about +0.3EC) but it has stopped there so I thought everything was ok... some days later still not a lot of growth compared to the other seedlings but as far as I could tell it was not getting worse at least so I thought the problem was gone and she needes some time to recover.
But yesterday the second seedling started to get some of the same yellowing like the first seedling but it was not a lot so I didn't notice it right away. Today the yellowing of the second seedling kept going on and the EC has risen for both again A LOT! the EC was 2.3 again!
Now my first seedling who developed these deficiencies first is very slow growing compared to the other seedlings and is getting worse and worse. And now the second seedling starts to develop the same problems too... And the others keep getting worse too...
I don't really know what the problem is since the EC is raising it looks like they are leeching nutrients in the solution instead of taking them up... I don't really know what was going wrong... Do you know whats happening?
I grow with LED so I use extra Cal/Mag. I use reverse osmosis water. The nutrients I use are general hydroponics TriPart.
The Cal/Mag bottle says to use 0.45EC CalMag. And the GHE TriPart says to add about 0.8-1.2EC for plants with first true leaves.
So I made a nutrient solution with 0.45EC Cal/Mag and 1.2EC GHE TriPart and got about EC1.6
The plants were growing good and fast (but not the first yellow leaves seedling) so I thought I was doing everything right... The EC raised the first day but after that it didn't kept rising and they started to take off. So I just let them stay that way the following days and they kept growing good (not the first yellowing seedling) but yesterday the EC has risen again and today again and now more plants show the same symptoms. Yellowing leaves and the lower leaves start to die on the leave tips... What is going on??
I think they maybe have nutrient lockout so I am flushing the system right now! After that I want to reintroduce the nutrient strength for first true leaves... Maybe the first yellowing seedling had nutrient lockout and since I didn't flush it she was still damaged... What do you think?
Should I have changed the res everytime the EC has risen so much? Maybe some of the nutrients were already used up but the EC was high because of some other nutrient leeching from the first seedling? I don't really know...
I'm reading the nutrient deficiency guide over and over again but I don't know whats going on here and I dont want to make things worse! Maybe they are too big by now and already need the vegetation feeding schedule instead of the first true leaves schedule... Maybe it's a Cal/Mag deficiency... Maybe Nitrogen... Maybe they have nutrient lockout... I don't know it's too much information for me right now.
Infos of the system:
Growlight LED
Hydro DWC
Feeding like the bottle says EC1.6 (1.2 nutrients GHE TriPart and 0.45 Cal/Mag)
PH 5.5-6.5
Here are some pictures (look how small seedling1 is compared to seedling2 who developed the deficiencies just yesterday until then it was groing good!):
Very slow growing Seedling1 from the top (developed the deficiencies 1 week or more ago):
![stunt_seedling1.JPG](/data/attachments/4342/4342595-416fe1ef5711facec0338366fbf535fe.jpg)
Very slow growing Seedling1 yellowing deficiencie:
![stunt_seedling1_yellowingdeficiency.JPG](/data/attachments/4342/4342596-341b7683c8fb8c8278ae63879b95c64f.jpg)
Very slow growing Seedling1 dying lower leaves:
![stunt_seedling1_dyinglowerleave.JPG](/data/attachments/4342/4342597-cfe6a644d42481b0be4b3ad9507f4dbe.jpg)
Seedling2 from the top:
![seedling2.JPG](/data/attachments/4342/4342594-b1b67b4942e92e066902741866104d42.jpg)
Seedling2 yellowing leaves:
![seedling2_yellowingleaves.JPG](/data/attachments/4342/4342598-a6cd7d5c4357cea63ddf9f1fc8041c72.jpg)
Seedling2 dying lower leaves:
![seedling2_dyinglowerleaves.JPG](/data/attachments/4342/4342599-59151c8e58c53bd93a90a36afcb10a18.jpg)
One of my seedling started to develop these yellow spots. I didn't worry because I wasn't feeding enough based on the nutrient schedule of my fertilizer bottle. I was feeding the "first Root"-strength but already had some true leaves on them so I checked the bottle again and changed the resevoir and fed my plants the amount stated on the fertilizer bottle for plants with first true leaves.
The other seedlings who did not develop the yellow spots were fine with the new nutrient solution and higher EC. But the one with the yellow leaves was stunt and the nutrient EC of her reservoir kept raising a lot (about +0.6EC) so I lowered it again and the next day it has risen again (about +0.3EC) but it has stopped there so I thought everything was ok... some days later still not a lot of growth compared to the other seedlings but as far as I could tell it was not getting worse at least so I thought the problem was gone and she needes some time to recover.
But yesterday the second seedling started to get some of the same yellowing like the first seedling but it was not a lot so I didn't notice it right away. Today the yellowing of the second seedling kept going on and the EC has risen for both again A LOT! the EC was 2.3 again!
Now my first seedling who developed these deficiencies first is very slow growing compared to the other seedlings and is getting worse and worse. And now the second seedling starts to develop the same problems too... And the others keep getting worse too...
I don't really know what the problem is since the EC is raising it looks like they are leeching nutrients in the solution instead of taking them up... I don't really know what was going wrong... Do you know whats happening?
I grow with LED so I use extra Cal/Mag. I use reverse osmosis water. The nutrients I use are general hydroponics TriPart.
The Cal/Mag bottle says to use 0.45EC CalMag. And the GHE TriPart says to add about 0.8-1.2EC for plants with first true leaves.
So I made a nutrient solution with 0.45EC Cal/Mag and 1.2EC GHE TriPart and got about EC1.6
The plants were growing good and fast (but not the first yellow leaves seedling) so I thought I was doing everything right... The EC raised the first day but after that it didn't kept rising and they started to take off. So I just let them stay that way the following days and they kept growing good (not the first yellowing seedling) but yesterday the EC has risen again and today again and now more plants show the same symptoms. Yellowing leaves and the lower leaves start to die on the leave tips... What is going on??
I think they maybe have nutrient lockout so I am flushing the system right now! After that I want to reintroduce the nutrient strength for first true leaves... Maybe the first yellowing seedling had nutrient lockout and since I didn't flush it she was still damaged... What do you think?
Should I have changed the res everytime the EC has risen so much? Maybe some of the nutrients were already used up but the EC was high because of some other nutrient leeching from the first seedling? I don't really know...
I'm reading the nutrient deficiency guide over and over again but I don't know whats going on here and I dont want to make things worse! Maybe they are too big by now and already need the vegetation feeding schedule instead of the first true leaves schedule... Maybe it's a Cal/Mag deficiency... Maybe Nitrogen... Maybe they have nutrient lockout... I don't know it's too much information for me right now.
Infos of the system:
Growlight LED
Hydro DWC
Feeding like the bottle says EC1.6 (1.2 nutrients GHE TriPart and 0.45 Cal/Mag)
PH 5.5-6.5
Here are some pictures (look how small seedling1 is compared to seedling2 who developed the deficiencies just yesterday until then it was groing good!):
Very slow growing Seedling1 from the top (developed the deficiencies 1 week or more ago):
![stunt_seedling1.JPG](/data/attachments/4342/4342595-416fe1ef5711facec0338366fbf535fe.jpg)
Very slow growing Seedling1 yellowing deficiencie:
![stunt_seedling1_yellowingdeficiency.JPG](/data/attachments/4342/4342596-341b7683c8fb8c8278ae63879b95c64f.jpg)
Very slow growing Seedling1 dying lower leaves:
![stunt_seedling1_dyinglowerleave.JPG](/data/attachments/4342/4342597-cfe6a644d42481b0be4b3ad9507f4dbe.jpg)
Seedling2 from the top:
![seedling2.JPG](/data/attachments/4342/4342594-b1b67b4942e92e066902741866104d42.jpg)
Seedling2 yellowing leaves:
![seedling2_yellowingleaves.JPG](/data/attachments/4342/4342598-a6cd7d5c4357cea63ddf9f1fc8041c72.jpg)
Seedling2 dying lower leaves:
![seedling2_dyinglowerleaves.JPG](/data/attachments/4342/4342599-59151c8e58c53bd93a90a36afcb10a18.jpg)
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