Help rust on leaves after adding pk13/14!!!!!

plant problem. ok im getting some kind of rust on my plant leaves. the problem is only at the tops of the plant. the problem started soon as i gave her, her first doze of pk 13/14 at 0.5ml per Liter. im using canna coco as soil, well this is how my mix was. 3.0ml of coco A&B, 2ml rhizotonic, 1ml cannazym and 0.5ml pk13/14 and 3 days later i seen all the rust on the leaves. at my next doze i wanted to put the pk at 1ml and the a and b at 2.5ml. but im not 100% its the pk that coused this problem but thats the only thing i did new and every thing was fine before that, here is a pic of the rust looking stuff on the leaves and bare in mind the problem is only at the tops of the plant, the bottem is fine its just started at the top, and please help as my watering is tomorow and i dont know if i should stop the pk13/13 or if there is any thing els im doing wrong.
View attachment 1269975

cant any one help?

Not 100% sure ... But looks like a Cal Mag Def .. is the rust shiney looking ?

how far into the flower stage are you ?

You say the problem only started after the PK ....so if you can back off untill the problem is cured it will not hurt , It could be that you never gave it enough though ?
The recomended dose from CANNA In the fruit Generatvie stage is 15ml per 10 ltr of water ... so if your into about week 3-4 of flower ... your mix should look something like this .

20 - 30 ml A&B 5ml Rhizo 25ml Zym 15ml PK PER 10 ltr of water .

btw ... you asked in my journal what nutes i'm useing .... CANNA

Its not a cal-mag prob. this would show in older bottom leaves first.

budalushious said:

Its not a cal-mag prob. this would show in older bottom leaves first.

Click to expand...

Yeah i come back to this coz its been buggin me ....I would like to see some better pics in normal light ...I know i have seen this befor im just not sure

my 2 cent ,id back off nutes and just use water and see wat happens first ,

ill post some more better pics soon as i get home in a few hours

i think you locked out check ph run off flush check run off then start from there but i defo think ph problem good luck

give her a flush, mine had a calcium mag problem and it did start from bottom up