Sick plant help!!!!

whats bloom cal mag?
 
just found it what ferts are you using with your plants?
 
Canna mate I just noticed that the top leaves stems are starting to turn purple aswell also can this be caused by low temps in the night and or over ferts
 
its also caused by a defiency as well cant remember if it was p or k

long as the added N in cal mag bloom dont effect the canna chems and you take the extra N into account you should be ok

considering your showing 2 defiencys i think your underfeeding a tiny bit try bumping the feed slightly more 0.1-0.2 ec and see what happens
 
Thanks mate I'm feeding 5 mil as canna recommended p liter the one kvs is a monster and a real bush shall I up my feed by another mil taking it to 6 p litre
 
take it up to 5.5ml and monitor close
 
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K mate thanks she due her next feed on Tuesday or shall I feed now but the pot is still quite heavy
 
25 days the biggest two and the tallest bush is taking 2 litres each feed and is light to lift after 4 days I last fed on Friday do you want me to take some pics of the biggest plant
 
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