Little problems

M

mdmw47

Member
Hello!
i grow in nft system whit advanced hydrophonics of holland nutriens,
And after i rooted plants to rockwool i placed them to nft system and week after that i find some problems leaf joint are turning yellow/white
I use 4x600w led but i dont use all power of them i use like 50%
Water temperature is 19 celsius and ph5.7 and ec 0.7
If anyone can help me whit this situation i will be very happy! And im sorry for my english..
 

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I’m seeing a potassium deficiency at least or the start of light bleaching. Your EC is in a proper range for age so wondering about the lights.
 
On my last grow i got that same problem and i cut them but now that think is again on my plants pics from last grow
 

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I disagree with potassium deficiency. I use Advanced Hydrophonics of Holland myself on Coco. It has more than enough Potassium, I always find it hast too little Nitrogen in its mixture. I usually start with nothing, then half of dosage only Bloom and Micro adding some more Mono Nitrogen. The suggested N-P-K Ratio is 3-1-1 in Growth. AH delivers 3-3-6 if standard mixture is used. This gives you yellow leaves very early.
 
In addition if you have hard (Cacium rich) water (EC>0.4) you should add osmosis water to lower plain EC. AH Micro has a lot (7%) of Calcium in it. Together with water initial calcium this may lead to lockout.
 
biker61 said:
I disagree with potassium deficiency. I use Advanced Hydrophonics of Holland myself on Coco. It has more than enough Potassium, I always find it hast too little Nitrogen in its mixture. I usually start with nothing, then half of dosage only Bloom and Micro adding some more Mono Nitrogen. The suggested N-P-K Ratio is 3-1-1 in Growth. AH delivers 3-3-6 if standard mixture is used. This gives you yellow leaves very early.
Click to expand...
Sorry I mistyped, at the beginning I use only Grow and Micro, not Bloom and Micro.
 
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