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NO its not normal for leaves to die off, your lacking a nutrient... Don't listen to anyone that says leaves dying off is normal cause they are WRONG!!!

looks like heat stress mixed with a def, I would say your also lacking magnesium

Not the plant foods cause I have tried many of them, that is a mag def. Here is a list of all that I have tried Fox farm advanced nutes MG General hydroponics neptunes harvest dutch master earth juice humboldt ionic alaska fish ferts and probably a few others that i'm forgetting.. So yes it is...

and according to "organic people" ppm's cannot be read when using organic food... But I don't know how true that is

whats your starting ppm? calmag is about 200 ppm per teaspoon

I'm thinking that it has something to do with the magnesium def

can you get a better pic? calcium might have something to do with it too.. I can't really see the white spots your talking about

Is spidemite damage was to the point of making your leaves look like that then you would def see webbing on the leaves

magnesium... next time right when you flip your lights to 12/12 start supplementing with either calmag or epsom salt. You wont ever have this problem again. And if your in soil and NEVER wanna have to worry about ph then I would recommend adding dolomite lime before hand. It will also add a...

magnesium def, treat with either epsom salt or calmag.. Next time you flower start supplementing with calmag right before they start flowering.

Take a pic with your hps light off

Looks like you got a magnesium def too...

I noticed that their feeding chart says to feed calmag with every feeding, has anyone experienced a mag def when using recommended dose?

Is this the subcool that is the breeder? Might be a dumb question but I think its cool as shit you can actually interact with a top notch breeder. Everytime I have ever tried to get in contact with a certain breeder I have NEVER gotten a response (and i'm pretty good at getting ahold of people)...

The reason I never started supplementing during veg is because I actually have tried it in veg but the plant never responded well to it. Only deficient during flowering

whats your rez temps?

And its def not a N def, I know that for a fact lol

I don't use that water anymore because I have moved from that spot, It only happens to this one strain and Its driving me nuts. I wanna just get rid of this strain but I have had it for like 6 years. My buddy used to make my soil and never had a problem with it but as soon as I used any other...

I have tried everything under the sun to remedy this, more feeding, less feeding, different food, co2, no co2, tap water, ro water, calmag (2 different kinds), lights closer, lights farther away, dolomite lime (pelletized, and powered).. The only thing I haven't tried yet is to start...