Check out this seedling?! Wtf is going on

Slimjimham

Slimjimham

Well-Known Member
You talking ontop of the blocks? That's algae and fairly common with rockwool... you even see it on their page at grodan
 
Teag

Teag

Well-Known Member
The yellowing between the lines of the leaves looks like a magnesium issue and the rust spots a calcium problem. But the leaves are clawing pretty bad which could be nute burn. Some of the leaves look twisted which might be a PH/root issue.
My wild guess is some issue in the root zone is causing all the problems. Check PH or a root disease. That plant maybe just doesn't like the that high of EC or a different PH range.
 
Macncheesehaze

Macncheesehaze

Well-Known Member
Teag said:
The yellowing between the lines of the leaves looks like a magnesium issue and the rust spots a calcium problem. But the leaves are clawing pretty bad which could be nute burn. Some of the leaves look twisted which might be a PH/root issue.
My wild guess is some issue in the root zone is causing all the problems. Check PH or a root disease. That plant maybe just doesn't like the that high of EC or a different PH range.
Click to expand...
I had a ph issue looked just like that and can also mimic other problems like manganese deficiency etc. I never used to even care about ph until I saw the difference between a well balanced plant and one that’s just getting whatever water it can get.
 
xtsho

xtsho

Well-Known Member
2.0 EC is too much for those small seedlings and 2.5 EC is too much for those other plants. I never go that high in full flower growing in coco. 1.6 EC is about as high as I ever go during anytime of the grow. A good percentage of all problems are caused by overfeeding.
 
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