Hi Guys!
I’ve been reading this site for a while and everyone seems to be super friendly, so I thought I’d join and ask for some help with some problems I’m having.
I am growing a Sativa dominant automatic, and it is about 3 weeks into flower, growing in a 2x2x4 tent.
I'm using Plagron Light Mix for the substrate, feeding it with Plagron Alga Bloom (at 50% recommended dose), and I’m currently watering it with 1L of PH balanced demineralised water (after I discovered that my tap water is around 450PPM), every 3rd day or so.
I'm running a Viparspectra 300 at 18/6, and it’s in an 8L (~2Gallon) plastic pot with extra holes drilled into the bottom.
The temp averages around 23c in the tent and I try to keep the humidity at around 40%, but it is a struggle and it often dips a little below this.
Problem 1:
I am seeing small light yellowish spots on a lot of the leaves. They’re mostly on the lower ones, and they seem to be spreading:
I have checked for spider mites, giving it a good look using a microscope, but I couldn’t see any signs of bugs: no eggs, nothing at all on the underside of the leaves, no webs. And I do not think it is mildew or mould, because it does not look like any of the many photos of this I have seen, and it does not rub off or move when touched, in fact it seems to be inside the leaves.
So I thought that it was maybe a calcium deficiency due to the demineralised water I’ve started using, but I recall seeing the beginnings of these spots back when I was still watering with heavy/hard tap water…so maybe it is a type of leaf miner, or something like that?
Problem 2:
I also noticed that the leaves are a very dark green, and some are clawing at the ends.
From what I understand these are signs of nitrogen toxicity. But if this is the case, I will be completely mystified as to how it was caused. The Alga Bloom has an NPK of 3-2-5, and I have fed it to this plant only 3 times…is it possible that I have a nutrient lockout from the first couple of times that I watered it with the hard/high PPM water?
Maybe Im completely wrong with all of these guesses, but I thought it might help to mention what I’ve done/checked for/etc
Any thoughts or suggestions will be most appreciated!
Thanks!
I’ve been reading this site for a while and everyone seems to be super friendly, so I thought I’d join and ask for some help with some problems I’m having.
I am growing a Sativa dominant automatic, and it is about 3 weeks into flower, growing in a 2x2x4 tent.
I'm using Plagron Light Mix for the substrate, feeding it with Plagron Alga Bloom (at 50% recommended dose), and I’m currently watering it with 1L of PH balanced demineralised water (after I discovered that my tap water is around 450PPM), every 3rd day or so.
I'm running a Viparspectra 300 at 18/6, and it’s in an 8L (~2Gallon) plastic pot with extra holes drilled into the bottom.
The temp averages around 23c in the tent and I try to keep the humidity at around 40%, but it is a struggle and it often dips a little below this.
Problem 1:
I am seeing small light yellowish spots on a lot of the leaves. They’re mostly on the lower ones, and they seem to be spreading:
I have checked for spider mites, giving it a good look using a microscope, but I couldn’t see any signs of bugs: no eggs, nothing at all on the underside of the leaves, no webs. And I do not think it is mildew or mould, because it does not look like any of the many photos of this I have seen, and it does not rub off or move when touched, in fact it seems to be inside the leaves.
So I thought that it was maybe a calcium deficiency due to the demineralised water I’ve started using, but I recall seeing the beginnings of these spots back when I was still watering with heavy/hard tap water…so maybe it is a type of leaf miner, or something like that?
Problem 2:
I also noticed that the leaves are a very dark green, and some are clawing at the ends.
From what I understand these are signs of nitrogen toxicity. But if this is the case, I will be completely mystified as to how it was caused. The Alga Bloom has an NPK of 3-2-5, and I have fed it to this plant only 3 times…is it possible that I have a nutrient lockout from the first couple of times that I watered it with the hard/high PPM water?
Maybe Im completely wrong with all of these guesses, but I thought it might help to mention what I’ve done/checked for/etc
Any thoughts or suggestions will be most appreciated!
Thanks!