Help please

[thehazzle]

Hey first grow on the go and some leaves are dark and clawing. I was using coco a and b in coco and perlite mix last two weeks switch to GH bloom and been using cal mag all way through.

Ph at 5.7-6.1

 

[MedGrower]

It would be valuable to provide more information of the conditions of this grow along with pictures of the whole plant under natural light in order for even the most expert grower to help you properly.

With this little information and while not being expert on coco at all, it sounds to me with dark leaves and clawing that you are having too strong of a feed. Hope this helps.

 

[Waira]

...looks like a bit of N-toxicity,.. what Ca-mg do you have? note the NPK numbers on it, some Ca-Mg has significant amount of N in it! Added into the rest of the feeds, it can become too much,... N is taken in by the plant whether it needs it or not, so cumulative inputs can exceed what it can use AND store,... not sure what the odd discoloration is, not distinct enough,.. might be tied to the N issue,...

 

[thehazzle]

...looks like a bit of N-toxicity,.. what Ca-mg do you have? note the NPK numbers on it, some Ca-Mg has significant amount of N in it! Added into the rest of the feeds, it can become too much,... N is taken in by the plant whether it needs it or not, so cumulative inputs can exceed what it can use AND store,... not sure what the odd discoloration is, not distinct enough,.. might be tied to the N issue,...

Just checked and it has nitrogen in it too. You're right. I use tap water and calcium already high in it, I might just get some magnesium to add instead.