careca.frito
Member
Hello everybody
I'm growing some plants on a 1m by 1m grow room under a 250 W HPS light.
They grow on good quality potting soil which I added perlite and dolomite (tap water pH here is 9)
Plants are now in mid stage flowering and start getting yellow leaves, that at some point got almost white.
The worst one is starting to get edge and tip necrosis.
Due to the fact I was using dolomite, I wasn't lowering the pH of the water until a couple weeks ago.
Since then I only gave them around 6-7 pH water which I lowered with H2PO4-
Symptoms got a lot worst the day after I watered them with a low dose of nutrient solution.
So I flushed them, but got no change.
All plants are affected, but the pictures here are of my most affected plant, but it's evolving quickly in all of them.
Any solution is really appreciated and if there is more info you need just ask!
Thanks
I'm growing some plants on a 1m by 1m grow room under a 250 W HPS light.
They grow on good quality potting soil which I added perlite and dolomite (tap water pH here is 9)
Plants are now in mid stage flowering and start getting yellow leaves, that at some point got almost white.
The worst one is starting to get edge and tip necrosis.
Due to the fact I was using dolomite, I wasn't lowering the pH of the water until a couple weeks ago.
Since then I only gave them around 6-7 pH water which I lowered with H2PO4-
Symptoms got a lot worst the day after I watered them with a low dose of nutrient solution.
So I flushed them, but got no change.
All plants are affected, but the pictures here are of my most affected plant, but it's evolving quickly in all of them.
Any solution is really appreciated and if there is more info you need just ask!
Thanks
