Calcium deficiency?

Thanks for any input !

I doubt it's calcium as it seems to be just a few affected leaves at random where deficiencies show on lots of leaves in the same class but have to start somewhere.

It looks more like physical damage from possibly water sprayed on for a foliar spray? Or even some fungal disease.

How's your humidity and temps?

It may be calcium and or a "P" deficiency kind of thing.

I would say since you are about halfway through flower is to not do very much about trying to correct it.
Stick with the plan.

What kind of water are you using??
And what kind of medium?
How often do you water?
Do you ever add calcium to your soil or feedings?

Cali.Grown>408 said:

What kind of water are you using??
And what kind of medium?
How often do you water?
Do you ever add calcium to your soil or feedings?

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Promix bx, phed water to about 6.2 AN three part for nutes. I have supplemented calmag twice

No foilar spray, temp arround 24-26c humidity fluctuates sometimes above 60 at night but try to keep it under control. Symptoms have gotten noticeably worse today.

Is calmag toxicity possible? A few weeks ago i added probably 3 times recommended dose one time because I didn't read the label correctly? I added more yesterday also.

OldMedUser said:

I doubt it's calcium as it seems to be just a few affected leaves at random where deficiencies show on lots of leaves in the same class but have to start somewhere.

It looks more like physical damage from possibly water sprayed on for a foliar spray? Or even some fungal disease.

How's your humidity and temps?

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Raise your pH to 6.5 and it will stop.

Do you test PH run off?? I’d test that then decide what I would do.
I’m pretty sure when you add to much calcium it will make your PH rise so it’s probably that. Next time you water use a lower ph and water till you get a decent amount of runoff

Renfro said:

Raise your pH to 6.5 and it will stop.

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This is right. That is calcium deficiency. 6.2 ph is too low. Especially if you are talking about your solution and not the soil. In that case, your soil ph is, likely, even lower. You miss out on lots of nutes at a ph of < 6.4ish, especially cal will show that low. 6.4/5 us optimal for veg, with bottle nutes. You'll see a big overall difference after raising it. You will sorta b chasing your ass on the cal def, though. Once u see it, you won't completely straighten it out. Don't try and dump a ton of cal to fix it. You'll end up locking out other nutes. Just reg doses, and heavy every other one. Keep your ph mid 6s, next time, with some supplementation,and you won't see it ever again.

Renfro said:

Raise your pH to 6.5 and it will stop.

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I agree! 6.2 is a touch low for soil...and I agree R Burns. Calcium deficiencies can be a pain to accurately diagnose then fix. But I've found that it's not uncommon that raising your PH a bit helps a lot with it. Especially in soil, because it usually has calcium in it, it's simply out of reach because of PH or etc.

I run between 6.5 and 6.8. When I was at 6.3 I had the same problems. Amazing what a difference a few points will make.