Hello guys, I'm on my first coco coir grow and I'm having issues with 2 out of 5 plants so far.
I'm using coco coir with 25% perlite and a bottom layer of rocks in 3 gallon smart pots.
I feed them Canna Coco A+B 8ml/gal and 5ml/gal of CalMag.
PH 5.8 - 6.0
Temp around 77F and 25% RH (low!)
On my Northern Lights I see a lot of brown rusty spot, even on the recent growth so I'm very worried. It's slowly getting all over the plant so I need to adjust something but I don't know what exactly!
Recent growth, little dark spots: http://i.imgur.com/xSkiwqC.jpg
Now, a different plant, this one is less severe but my White Widow x Big Bud has small yellow patches on the leaves.
http://i.imgur.com/OMNRA6M.jpg
http://i.imgur.com/BIR6v9v.jpg
Very purple stem, is this a Phosphorous deficiency?
http://i.imgur.com/qAHaDcR.jpg
Thanks a lot in advance!
I'm using coco coir with 25% perlite and a bottom layer of rocks in 3 gallon smart pots.
I feed them Canna Coco A+B 8ml/gal and 5ml/gal of CalMag.
PH 5.8 - 6.0
Temp around 77F and 25% RH (low!)
On my Northern Lights I see a lot of brown rusty spot, even on the recent growth so I'm very worried. It's slowly getting all over the plant so I need to adjust something but I don't know what exactly!
Recent growth, little dark spots: http://i.imgur.com/xSkiwqC.jpg
Now, a different plant, this one is less severe but my White Widow x Big Bud has small yellow patches on the leaves.
http://i.imgur.com/OMNRA6M.jpg
http://i.imgur.com/BIR6v9v.jpg
Very purple stem, is this a Phosphorous deficiency?
http://i.imgur.com/qAHaDcR.jpg
Thanks a lot in advance!