Brown Spots and Dying Leaves

I’ve had this problem with one of my two plants on a couple of my grows (I grow two at a time). See the attached picture, but essentially I get brown spots on several leaves.

I’m currently growing Durban Poison and Strawberry Cough. I am about one month into Veg. The Durban seems to be doing great, but the Strawberry is getting the brown spots. I’m plucking like 5-10 leaves like this a day. I tried adding Cal-Mag into my nutrient regimen (the directions say to wait until one week before flower). It doesn’t seem to be helping much.

I would really appreciate your help with this one, super frustrating!!!

TIA

How's the plants doing? What nutrients are you feeding other than cal-mag.

Much better I think, thanks!!

I believe it was calcium deficiency possibly due to low pH in the soil. I started raising the pH of my water and added in Cal-Mag and the situation has drastically improved after a week or so. I use Big Bloom, Grow Big, Tiger Bloom, and Cal-Mag. All FoxFarm products. I’m not sure why it says to start Cal-Mag one week before bloom. I’ll probably use it all throughout veg in the future.

if your using soil and tap ditch the calmag. Id check for pests also

bam0813 said:

if your using soil and tap ditch the calmag. Id check for pests also

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There aren’t pests as far as I can see. Why ditch the Cal-Mag?

There’s calcium in the soil, in tap and in your nutes. It almost always causes more issues to add even more ,than it fixes in a soil and tap water grows imo.
Too much calcium will lock out magnesium or potassium, and the only way to correct the problem is by first dealing with the calcium issue. So, although you're experiencing potassium and magnesium related symptoms, the actual root of the problem stems from too much calcium.

bam0813 said:

There’s calcium in the soil, in tap and in your nutes. It almost always causes more issues to add even more ,than it fixes in a soil and tap water grows imo.
Too much calcium will lock out magnesium or potassium, and the only way to correct the problem is by first dealing with the calcium issue. So, although you're experiencing potassium and magnesium related symptoms, the actual root of the problem stems from too much calcium.

Click to expand...

Yes but I had the issue prior to adding Cal Mag and it has gotten way better since I added it in.

It look like pest to me, spider mite or thrip