Why are my leaves getting yellow spots HELP ?

I’m about 8 days into flower and my leaves are getting yellow spots here’s a pik what can this be ?

Looks like a calcium deficiency. Do you use RO water? Whats the pH and type of growing method? Tell us more about your grow.

Renfro said:

Looks like a calcium deficiency. Do you use RO water? Whats the pH and type of growing method? Tell us more about your grow.

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No I don’t use RO been using tap water since day one ph usually 6.2-6.5 growing with advanced nutrients and fox farm ocean forest

It looks like a Calcium issue to me as well. Depending on where you live, they might be adding some sort of calcium sequestering agent to your water to soften it up. That might be whats going on. And other pics? Is it only on lower leafs, upper leafs, or everywhere?

Let’s see more pics. How many leaves are effected? Bottom up issue? Calcium deficiency happens often even using tap. That and nitrogen deficiency are the always the first issues I see with my plants. Addition of cal mag and slightly higher rate ofndry fertilizer mixed in soil and not no issue anymore

Also, would it be possible to get pics under regular lighting? HPS lighting makes distinguishing symptoms difficult. But from what I see, it does remind one of calcium def...are you feeding any high P-K boosters? I know that very high volumes of K can displace calcium.

So far I’ve only seen like 2-3 leaves spotting I’ll will post better pikz asoon as I get home lower and upper leaves have gotten the spots so I just give it some cal mag ?

You should get your tap water tested if you can (or go to your countys website you will often find the analysis there, eg. I know mine is 392ppm from their website, super hard fuck where I live). Hardware stores sell cheap water test kits too.

I agree though looks like calcium. What is the pH of runoff vs. nutes you feed, what is the EC of runoff vs. feed?

Can't hurt to give it some cal-mag, just keep an eye on EC.