Is this a calcium deficiency? Or something else?

Hey guys.

I'm doing an organic soil outdoor grow at the moment but a few of plants are having issues, all displaying the same symptoms. (mottled brown spotting and slighy dry and papery feeling leaves, and growth is quite slow or completely stunted on a couple of them, also some of the new growth is twisted and abnormal) I suspect that it may be a calcium/magnesium deficinecy but I'm really not sure. I have been using calmag which I know is usually used for coco, but it's what I've got so thats what I'm using.

So anyway if anyone can help me out and let me know what the problem is here and/or how I can fix it, I'd be really grateful.

You probably dont need cal mag if your in soil soiless, how big are your pots maybe root bound pop them out and check the root mass, if roots are poking out of the bottom then time to pot up

Does look like cal def. And sounds like it, based on your description. Have you been using the cal/mg all along? Cal def will be slow to correct, so if you just started with the cal/mg, you may just need to wait. If your ph is too low, it won't matter how much calcium you add. Do you know the soil ph?

R Burns said:

Does look like cal def. And sounds like it, based on your description. Have you been using the cal/mg all along? Cal def will be slow to correct, so if you just started with the cal/mg, you may just need to wait. If your ph is too low, it won't matter how much calcium you add. Do you know the soil ph?

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Thanks for the reply, yeah I only started using the cal mag about 2 weeks ago actually. The last time I checked the pH it was about 6.8 but i haven't been checking regularly, so I'll do that again.

tiltswitch said:

You probably dont need cal mag if your in soil soiless, how big are your pots maybe root bound pop them out and check the root mass, if roots are poking out of the bottom then time to pot up

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Yeah I shouldn't be having to use any cal/mag supplements, it's good soil, but in not sure what else the problem could be. They are all in about 30 litre or about 6 gal containers and I don't have anything bigger right now.