multiple powdered plant food help! If you help me I will love you !

Use that stuff on ya garden and buy proper cannabis nutes, I say this coz ya going to have a hard time mixing it without over doing one or two elements. Keep it simple on ya first grow as u dont want to be over feeding! also NPK is only the main nutes there are loads of micro nutes aswell.
 
But if you really must you could try,

1 cup miracle grow, 3-2-6
1/8 cup Sulphate of Potash, 0-0-6
2/3 cup Sulphate of Ammonia, 14-0-0
1 cup Bone meal, 4-10-0

total 21-12-12

But your PH will probaly be way out and you will need to test,

I DONT RECOMEND IT THOUGH!
 
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