calmag? or just natural fade

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hey everyone. I have a question about one of my plants it is a DGx3B Mephisto Autoflower. Unfortunately i am not with my plants at the moment as i am away studying but my father is taking responsibility. It is on day 42 feeding Megacrop, sweet candy, and bud explosion PH’d every feeding and i have been trying to get him to add 1g/g of epsom. sorry for the low quality pictures they would be better coming directly from me. Driving me a little crazy not being able to be hands on
 

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Looks like classic nutrient burn due to over feeding.
Thanks for the reply. I was defiantly over feeding 10-15 days ago but backed off of the MC and starting only feeding 2/3 watering. Would another plain watering then lowering dosage help? The thing that caught my eye was the slightly yellowing of the bottom/mid level leaves
 
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you say you are feeding them all these things but dont say how much. also you are probably ok with just MG unless you are really in bloom, and then even you can limit your bloom nutes. are you growing in soil? what are you PHing to?
thanks
 
you say you are feeding them all these things but dont say how much. also you are probably ok with just MG unless you are really in bloom, and then even you can limit your bloom nutes. are you growing in soil? what are you PHing to?
thanks
Last few feedings in the feed feed water cycle.
Per gallon:
3g megacrop
.6g sweet candy
.6g bud explosion
Yes. Growing in Biobizz light mix soil. Always between 6 and 7 I would say typically 6.3 or 6.4
 
looks good, definitely keep the ph down to 6.3 or so. might be good to measure run off just to see what stays in the pot, but the above looks in line. how are the other parameters, where are your lights, what is the temps, are you bringing in fresh air, exhaust fan, etc?
 
looks good, definitely keep the ph down to 6.3 or so. might be good to measure run off just to see what stays in the pot, but the above looks in line. how are the other parameters, where are your lights, what is the temps, are you bringing in fresh air, exhaust fan, etc?
Lights about 18-20 inches above canopy. Mars TSW2000. Tmp stays between 75-81. Yes using exhaust fan and passive air inflow. 3x3 tent
 
It's over feeding.. To verify that, check the ppms of the run off. Use RO water and water until you get about 3 or 4 cups/glasses full of run off. Check the ppms of the 4th cupful. Normal max ppm range for an auto is about 5-600 ppms. Some plants can handle higher feeds, most can't. When I used bottled nutes I never fed a ppm higher than 700.. And that was in mid flower. There is no easy way to lower the ppms once they are out of range. You can flush until they are back in range, or water with water only until the plant uses more of what's already in the soil. Regular checks of the ppms and ph can tell you if your plant is feeding, and how much/how often.
 
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