Okay I know the balance for miracle grow ferts is not right for cannabis. However, if I were to use it say 50% strength or even 25% is it still really bad? I figure the main issue is the salting of roots etc. The issue being that it being my first grow, I am low on money and just so happened to have access to free MG ferts. So good or bad or just not recommended? Ya I know Fox Farm blah blah. I can't order anything online due to the fact that my parents would be like wtf is this fertilzer for and why did it get delivered to our house... you get the picture thanks for any replies.
The MG nutes would probably be fine in moderation. I'd try them like 1/8th strength at first though. You want a high N(itrogen) like 10-5-5 for veg and a high PK like 0-10-10 for flower. Don't use anything time-release though, and don't grow in your parents house without their knowledge/approval.