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Nute or too much light

buzz

New member
Not sure if this is to much light nute burn or potassium deficiency my lights as far away as I can have them at least 18 inches my nutrients I’ve cut right back to only a quarter Of the amount so just not sure any help would be greatly appreciated cheers Buzz
 

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From the photo I would say nute burn. Is it a hot soil you are using? If so stop adding any nutrients. Were you using a full dose of nutrients before you cut back? These appear to be older fan leaves. How is the new growth looking?
 
Not sure if this is to much light nute burn or potassium deficiency my lights as far away as I can have them at least 18 inches my nutrients I’ve cut right back to only a quarter Of the amount so just not sure any help would be greatly appreciated cheers Buzz

It seems to me that the heat emergency is accompanied by potassium deficiency; I don't know if it is correct or helpful to you.
 
I’ve only fed A quarter of the normal amount of nutrients and my medium is Terra professional and my ph run off is 6.4 6.3 6.5 the one those leaves are from The one that is 6.5 and my lights are two 600 W and one 400 W high-pressure sodium my tent is just over 7 feet long 4 feet wide and 6 1/2 feet tall my humidity is around 45% and the temperature is around 22 Celsius I hope this give you a better idea as to what’s going on so any help or advice would be greatly appreciated cheers peace
 
Hope these pictures help answer your question about new growth I’m hoping it’s not bad enough to cause too much of a problem as they’re all due to be flushed in two weeks
 

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Dark leaf and yellow tips, Nute burn. Just back off them a little till your flush.
Nice looking plants.
 
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Thanks very much I’ve cut them right back so hopefully they will be ok. Not really sure what you mean new looking plants though ?
 
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