Canna with RO water needs Cal / Mag supplement ... they assume the tap is coming out at .4 EC with Calcium and Magnesium naturally occurring in the .4 . You think I’m over doing the nutes ?
Running in Coco about 3-4 weeks old plant was healthy prior to feeding 24hrs ago. 700ppm and 1.5 EC PH 5.9 fed until some run off...Running with Canna Nutes ...Seems to be mainly on Old Growth Any help would be appreciated
Top leaves are yellowing like this, and bottom are curling. Is this a Cal mag deficiency? Canna coco with canna nutes. Or am I just under feeding them ?