Help! problem spreading fast!

I am in week 4 of flower with some chem4 OG beauties. I have them under 1000 watt hps light on a 12/12 cycle. They are in foxfarm soil. The temp is maintained at 75 degrees and humidity between 50-60%. I am feeding them "X Nutrients" and have fed them three times now with plain RO water in between each feeding. I am following their "advanced program" feeding schedule which can be found here: https://www.xnutrients.com/feeding_schedule.pdf

I posted this same question two weeks ago and the answer I got was a "cal/mag deficiency". I have since got cal/mag supplement and have gave it to them 3 times now, twice with just straight RO water and once mixed with their regular nutrients. When i first noticed this problem two weeks ago it was only on a handful of my 7 plants leaves. Now it has spread a lot to the majority of the leaves and is getting worse by the day, Please help, what could be the problem??!!

FOR FUCK's sake dude, the rust spots are a K def.
You don't mention your PH, so I can't say give more K, but now you have a starting point.
BTW, who told you the rust color was cal/ mag????????View attachment 2699689

thanks but wtf is with the attitude, you think if i knew that was the problem i would be on this forum asking questions? fuck.

and its def not a K deficiency because they are getting fed a full line of nutrients with plenty of K in them. I consulted with a few knowledgeable local cultivators and they all seem to agree that it is nute burn because I started a new line of nutrients and didnt do the best job of easing the plants into it. Next time I know now to give full strength nutrients right away.

fmx09 said:

thanks but wtf is with the attitude, you think if i knew that was the problem i would be on this forum asking questions? fuck.

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The attitude isn't there to you man, you are obviously asking because what you have done so far isn't fixing it.
I couldn't believe somebody told you that rust was Ca/ Mg.
There are some people unfortunately that think shoving Cal/ Mag at their plants is a 'fix all'.
The reason I say K def., is because I frequently have the same issue unless I keep my K fairly high when flowering.

Bakatare666 said:

The attitude isn't there to you man, you are obviously asking because what you have done so far isn't fixing it.
I couldn't believe somebody told you that rust was Ca/ Mg.
There are some people unfortunately that think shoving Cal/ Mag at their plants is a 'fix all'.
The reason I say K def., is because I frequently have the same issue unless I keep my K fairly high when flowering.

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OK, sorry for the misinterpretation. It didnt turn out to be a deficiency of any kind, I just need to ease them into their nutrients next time instead of giving them full strength and hoping it wont burn them. I flushed each plant with 4 gallons of RO water and waited 5 days and I just wantered them again with RO+super thrive to try and help them bounce back. So far so good, prob hasnt gotten any worse in the last week. Gunna ease them back into their nutes next week at 1/4 strength. I should have 3-4 more weeks before harvest. Thanks for the help.

once i have the same problem but with one strain called AK 48 and i cant figure out the problem then i found out this strain hard to grow indoors but great outdoors
i suggest check the strains so far you doing great

fmx09 said:

and its def not a K deficiency because they are getting fed a full line of nutrients with plenty of K in them. I consulted with a few knowledgeable local cultivators and they all seem to agree that it is nute burn because I started a new line of nutrients and didnt do the best job of easing the plants into it. Next time I know now to give full strength nutrients right away.

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YOU are giving attitude with the "It isn't what you people are telling me it is cuz I feed it"...

REMEMBER:when you use RO water you have to add ADDITIONAL MINERALS because you took them ALL out with the filter!!!
So the "usual amount" isn't going to cut-it... the amounts on the charts are NOT the same for use with R.O. water!!!

If you are "OK" with asking for help- you need to be "OK" with the different answers you'll get and be open to the possibility & likelyhood that the people helping you just might know what they are talking about!