I have this but will nvr use it On MJ!
Go spend your money on these nutes. Earth juice grow & bloom. Get these! all organic.
Miracle grow is horrible. with the nasty record it has that i have read about it on this site.
Bring it back to the store.
Its not ideal but yes it will work fine, go easy with the strength.... "Time realeased" generally refers to MG soil that has food that releases over time mixed in...