What is your grow medium? If its soil it should be between 6.4 - 6.8. You are locking out calcium which is why your showing a deficiency of it. Beginning 3rd grow(Apprentice) - BC Big Bud
Yes coco. Ph is 5.8 using tap water I've just got these from a cuz. He was using ionic or summet. I'm using Dutch pro a b grow " multitotal " take root " ph down grow. It recommends between 2.5 n 3.5ml a b per litre. I did 1ml per 3 litre. The root n multi says 1ml per litre I did 1 per 3 litres. Only just now realising that's wrong. Would that be the problem mabe. It was a couple of leaves on a couple plants. I have also started lsting. 600w cool shade. Temps 25-28 and 15-19 30 40 rh
Can you put up a pic of the whole plant? You should up the nutes to 1/3 or so not 1/6th like your feeding. You might want to talk to some coco specialists on here. From what I've hear it is a bit of an art in itself. Beginning 3rd grow(Apprentice) - BC Big Bud
http://forum.grasscity.com/sick-plants-problems/1138165-calcium-def.html Check this thread out my friend I think it'll help you. Beginning 3rd grow(Apprentice) - BC Big Bud