Rust spot nutrient burns?

Getting close to harvest
First grow using RO water is it normal for the rust burns towards the end of flowering?

You have weeks to go and by the looks of it things are about to take a big turn for the worse. That looks like classic calcium deficiency but without knowing anything about the grow who knows why?

pegboy said:

You have weeks to go and by the looks of it things are about to take a big turn for the worse. That looks like classic calcium deficiency but without knowing anything about the grow who knows why?

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I used 8mL of Advanced Nutrients cal-mag per gallon every feeding

CTgrower420 said:

I used 8mL of Advanced Nutrients cal-mag per gallon every feeding

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What grow media? What PH? I suspect then you're getting lockout of some sort.

pegboy said:

What grow media? What PH? I suspect then you're getting lockout of some sort.

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FF Happy Frog / Ocean Forest mix
Always 6.2-6.5 pH
Been using a good nutrient feeding chart including the calmag these burns just started popping up in the last week or 2

Is it mostly where there’s heavy light?

Fallguy111 said:

Is it mostly where there’s heavy light?

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That was my next question

Theres some nute burn there as well. Salt buildup?

Also using AC self feeding fabric pot bases for the first time and usually only have to water feed once every 4 days with not sure if the bases are part of the problem I’m starting to drain the runoff every 3 days from pots instead of the wick bottom feeding the run off because that makes where I can’t water them for a good 5 days

Fallguy111 said:

Is it mostly where there’s heavy light?

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It’s actually getting most the lower plants with less lights

I'll let others chime in. That was looking like a great grow too.

pegboy said:

I'll let others chime in. That was looking like a great grow too.

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still a great grow lol just a little deficiency somewhere I’ve grown some killer buds in the past with extreme leaf burn deficiency

CTgrower420 said:

still a great grow lol just a little deficiency somewhere I’ve grown some killer buds in the past with extreme leaf burn deficiency

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Well....to a point. If this has been a reoccurring problem I would say toss that feed chart in the garbage and go lighter on the nutes from the start.

pegboy said:

Well....to a point. If this has been a reoccurring problem I would say toss that feed chart in the garbage and go lighter on the nutes from the start.

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Probably going to reduce the nutes they want me to add 16mL per gal of the base nutes I use by Advanced Nutrients